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Australia’s debt and interest burden: can we afford it?

In Australia, the Commonwealth Government was carrying very low debt levels of $50 billion before the GFC. Then, to counter the GFC, it borrowed an average of $50 billion per year net for the next 10 years, taking the level of debt to $560 billion before the virus hit. Now it is borrowing around $35 billion per month to fund all of its welfare programmes.

Can we afford all this debt?

The Commonwealth Government ran surpluses for six years from 2003 to 2008 in the China-driven mining boom, then it ran deficits in the GFC to support economic growth and jobs. That is precisely what governments should do - build surpluses in the good years so they can deficit-spend in economic crises to provide short-term support.

The problem was that both Labor and Liberal/National governments since the GFC became addicted to big spending and running up deficits well beyond the GFC. The Commonwealth ran deficits for the next nine years until 2018, for what was really just a one-year crisis, especially as the Chinese stimulus re-boot boosted exports, revenues and jobs from 2010 on. Windfall iron ore revenues produced a tiny surplus in the June 2019 year, but Commonwealth debt had grown from $101 billion (8% of GDP) in the GFC in 2009 to $540 billion (28% of GDP) in 2019.

The size of government has been increasing over time as a share of total national spending. In 2007, at the top of the last boom prior to the GFC, Commonwealth spending was $224 billion (21% of GDP), but by 2019 before the virus, it had grown to $448 billion (25% GDP). During that time the debt pile grew by 830%, but the population grew by just 20%, and CPI inflation had only risen by 30% in total. Then the virus (or rather the virus lockdowns) hit, and the government is now borrowing $30 billion-$50 billion per month to fund its spending programs. This seems high, but is it?

To provide some context on the national debt, the chart shows Commonwealth Government debt, and the debt servicing costs since Federation. The pink bars in the lower section show debt as a percentage of national output (GDP) each year.

Recent debt build-up and affordability

Toward the right end of the pink bars, we see the build-up of debt from 2009 on. The two black bars represent likely 2021 and 2022 debt levels assuming the current plan to increase debts by $240 billion in the current June 2021 year, plus an additional say $100 billion in the June 2022 year. Welfare is extremely difficult to scale back or withdraw (eg the JobSeeker will probably remain at the higher level) and it doesn’t include the government promises of tax cuts.

The current level of debt at 37% of GDP is higher than it has ever been since 1956, but still lower than historical average debt levels. The likely 2021 and 2022 levels of debt are also still low relative to the previous big debt build-ups. 

Australia’s current level of government debt is low relative to most of our global peers, and even the 2021 and 2022 levels would be low in global terms. But more important than the level of the debt is its affordability.

The current $684 billion of debt costs taxpayers $22 billion per year in interest, or $61 million every day, or $2.40 per person per day (less than one coffee per day per person). The total interest burden sounds like a lot but there is more to the story.

The affordability of the debt is shown in the upper section of the chart. Interest on government debt as a percentage of national income (GDP) (red line), and also the percentage of government revenues (black line). The current interest burden is quite modest, at 4.5% of government revenues and just 1.2% of national income.

This is lower than almost any other time since the early 1950s, and also lower than almost every other country in the world today. Even the likely 2021 and 2022 debt levels would see the interest burden at around 5% of government revenues and 1.5% of total national income.

The reason for the relatively low interest burden is that the interest rates on government bonds are at historical all-time lows thanks to declining global bond yields since the GFC, and the RBA pegs and bond-buying since the virus crisis.

Low rates will not last forever

Bond yields will probably rise in the medium term as economic activity recovers here and around the world. The good news is that rising bond yields don’t translate into higher interest payments until each bond matures in the future and is refinanced by another bond at a higher prevailing rate at that time, which in some cases is 30 years into the future.

Even if bond yields rise rapidly in the next few years, the average interest cost on the total pile of debt will remain low for at least another decade because of the low rates already locked in.

If Australia were a company, its national debt would be labelled a ‘lazy balance sheet’ and the CEO and Chairman would be fired by shareholders for not borrowing enough to invest in productive assets for future growth.

Based on affordability, these levels of debt are manageable but there is one major caveat. Investing for the long-term future requires coherent vision, long-term commitment and a willingness to make tough decisions. These require longer election cycles than the current theoretical three-year terms (which never last the full three years), and recently have been punctuated by ‘palace coups’ within the ruling parties between elections. 

With that caveat in mind, Australia’s position is one of the best in the world. It has always been a country in which the opportunities for growth and investment have far exceeded the local savings pool available to fund its development, and so it has always had to import people and capital.

A country is not a household

When talking about debt, many people liken a country to a household, where it is prudent to have no debt, or at least to pay off debts as quickly as possible. In a household, the breadwinner(s) stop generating income at some point and thereafter must draw down their accumulated savings to fund decades of retirement spending with no labour income.

However, a country is more like a company than a household. Companies and countries can last forever (in theory anyway) and they can (and probably should) carry a level of debt, as long as the cost of debt is lower than the additional income generated by the productive assets funded by the debt. Ideally, the debt should be in the country’s own currency (as is 100% of Australia’s debt), and should mainly be fixed-rate, not floating, so the level of interest payments is not volatile (this is also true for Australia).

Most countries lie somewhere between these two views. Australia has an aging population and rising welfare and health costs, but it is still the best placed among its ‘developed’ country peers due to its relatively favourable demographics and healthy immigration programmes targeting work-ready individuals and families.

It is far better placed than Japan and northern Europe that have declining populations, declining workforces and declining tax-payer bases. Those countries are indeed more like households, where the breadwinners in aggregate are reducing their income-generating ability and are literally dying off.


Ashley Owen is Chief Investment Officer at advisory firm Stanford Brown and The Lunar Group. He is also a Director of Third Link Investment Managers, a fund that supports Australian charities. This article is for general information purposes only and does not consider the circumstances of any individual.


May 14, 2022

I would love to know where the interest is paid too, I have my suspicions but I would appreciate an informed opinion

March 28, 2022

These people who should know better. Read 'The Deficit Myth' by Stephanie Kelton.

Bruce Gray
October 01, 2021

Australia is going towards a fast and unsustainable financial peril. 1. As debt grows, so does risk of higher interest rates across the board, including housing mortgages. 2. As debt grows, so does the % of tax revenue that goes towards servicing the debt with interest payments. As this grows, expenditure decreases towards infrastructure growth and maintenance, education, public health, social security. 3. Borrowing to support economic growth (infrastructure) is not as perilous as borrowing to survive (welfare pmts). When govts virtue signal to the rest of the world what great humanitarians they are, they are always quiet about the fact their tax payers cannot afford this virtue and therefore the govt has to 'borrow' to fund the welfare burden of unskilled and humanitarian migrants. 4. Public debt increases inflation, and de-values the dollars earned by Australians. For Joe Average to not have a decrease in real wealth, they need to borrow some of the newly created dollars, typically by buying residential investment properties. This increases demand for limited residential housing, and drives up house prices well beyond CPI rate. 5. Govt stimulus is not as effective as govt spins. Why? because money created by govt and injected into the economy as loans and cash payments to individuals and companies goes mostly off shore. How? when Australians buy fridges, tv's, cars, these goods are imported, so the money flows off shore, and does not recirculate within the Australian economy. When Australians buy property, much of the private interest pmts go off shore to foreigners who lend to Australian banks. This figure is buried in Australian bank the % of offshore wholesale funding, a topic too confabulated for most to get their head around.

June 12, 2021

We desperately need more competent, better managers in many areas. Specially in government areas where overstaffing is rife.

Darren T
March 10, 2021

I love this talk about roads as its for some reason important to me. I have several issues around where I live in Gladstone, Central Queensland. We have a strip of road lets say its 15ks long that was always 100k zone. About 15 years ago someone decided to "upgrade" this road. Upgrade should really mean resurface. After this work was completed, after almost 2 years of work, someone from Main Roads decided this should now be a 90k zone. So 2 years work, 10s of millions of dollars and the zone is down graded in allowable speed to be travelled. In industry we have a concepts such as "continuous improvement". This was not continuous improvement as now this section of road was deliberately turned into a bottle neck. And of course we have other surrounding roads which are regularly being reworked, as the road base used is not "fit for purpose". Looking to the side of this carriage way, you will observe trees and plants that like wet feet, ie swampy country. And of course this section of road is subsiding regularly. Why does this happen, because the Qld state government only allow "Like for Like" repairs for the grant or budget supplied. Any graduate Civil Engineer would recognize that road base was not appropriate from the get go. This is not sustainable.

Alexander Stitt
September 19, 2020

Thanks Ashley. I always enjoy your clear-eyed and unbiased views of the world of money. This analysis is eminently shareable. Have to laugh, with the benefit of 2020 hindsight, at all the angst of the Liberal's "debt truck" of the early naughties. Ah, what japes!

September 19, 2020

Australia is also in a favourable position because the overall tax burden is relatively low for a developed country. There are a lot of tax breaks for the wealthy which could be reversed. The natural resources sector could be taxed more and GST could be doubled to bring it into line with other developed countries. If necessary a lot of additional revenue can be raised instead of more debt.

It would be of great benefit to Australia if the economy could be reoriented from pumping up real estate prices to investing in productive industries that increase the standard of living and quality of life for Australians. Renewable energy and import substitution would be two suggestions. We send far too much money abroad to buy stuff we could be producing at home which would boost jobs and incomes for Australians rather than foreigners and make us more self sufficient and resilient in an increasingly uncertain world.

September 16, 2020

I figured out why when the government builds a road it takes decades, while when private enterprise builds a toll road it is completed in next to no time. Why?

Private enterprise realises that that don't get one cent in toll revenue until the road is open and operating. They will borrow whatever is necessary to complete the road as quickly as they can so that they start collecting tolls

The government gets re-elected (or at least their local member does) by having money spent in his electorate. If the deal with the local member was "we will complete the road this year, and then your electorate gets no money for the next 20 years" then the local member wouldn't get re-elected because he isn't getting any money spent in his electorate.

Therefore two reasons why the government takes longer to build a road than the toll road operator:
1. The government is frightened of debt (a budget deficit means to the media incompetence)
2. Local members get re-elected for having money spent in their electorate, not for completing a project. If the project drags on for decades, then they point to all the money that is being spent (but not actually delivering the new road - yet)

September 16, 2020

Rather than run up debt with jobkeeper etc wouldn't the government be better if it invested in infrastructure and employed people
That way the debt would be offset with the asset eg the road

Gary M
September 16, 2020

An interesting point made on ABC's The Drum last night is that instead of saying "Spend $1 billion on roads", we should ask "How many jobs will $1 billion create in which industry?" and then do the economic impact analysis. It said that for every $1 million spent on roads, 1 job is created, but for every $1 million spent on health and education, 15 jobs are created. Which provides the best stimulus?

September 16, 2020

Of course the other thing worth considering is the cost per metre of road construction. I see local road builds where contractors play around for sometimes years. A 200 metre section of local road took over a year to complete. I compare that to a long stay in France a few years ago where I witnessed road building by the kilometre and it was done a weeks not years.
It is a bit tough comparing road construction with other cash generation ventures and we need roads done whatever the cost. My issue is we have a failed system of government employing contractors who milk the public purse and it never changes. Our issue is with inability of governments at all levels to manage OUR money and I have to ask why are politicians being elected if not to do the work of society.

September 16, 2020

Our local footpath was paved with great care and attention, then two weeks later, another agency dug up 100 metres of it to lay some services, then filled it in with bitumen. Does nobody coordinate this stuff? It just looks like a make-work project.

September 16, 2020

Its lack of real accountability and the protection of the state. If they can't be fired then they're God and can do as they like. This is the issue.
In private industry an employee who loses money for their employer is out the door. In government entities they get a pay rise.

Tony Reardon
September 16, 2020

We need to look beyond “jobs” and ask what is being produced? A road (assuming it goes somewhere) is an enabling piece of infrastructure that will make a difference for many years into the future. Even better if we can produce the road with fewer people with better equipment for lower costs. As the Canadian politician William Aberhart is reputed to have replied when told that only picks and shovels were being used on an airport construction project instead of modern machinery in order to create more jobs, then why not give the men spoons and forks if the object is to lengthen out the task.

If spending on education results in a better educated populace with useful skills, then fine. However if all we do is employ more people to deliver the same quality of education to the same number of students, nothing is achieved. Even worse, we might teach nonsense to a whole cohort of people and waste everybody's time.

Health in many ways can be the same. Spending is heavily weighted to the last few years of life – one quarter of Medicare spending in the USA is in the last year of life. Because we are all somewhat reluctant to recognise that death is inevitable, health spending can suck in an ever increasing amount of GDP. We can do more and more testing, spending on ever more expensive machines and treatments for little or no gain.


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