The concern is not simply how much money Australia owes. It is what happens when that debt becomes more expensive.
We received a useful example from the United States this week. The US Treasury announced that it would double some of its purchases of older, long-term government bonds, initially pushing bond yields lower. Within 24 hours, however, those yields had recovered and moved higher again. The US 10-year Treasury yield returned to around 4.7%, while the 30-year yield moved above 5.2%.
In simple terms, bond yields represent the return investors demand before lending money to a government. When investors become worried about inflation, government spending or whether too much debt is entering the market, they generally ask for a higher return. That makes borrowing more expensive.
It is important to clarify that lower bond yields are not necessarily good for inflation. They are good for borrowers because they reduce financing costs, but cheaper borrowing can also encourage more spending and investment. Higher yields can help slow demand, although they also increase costs for governments, businesses and households.
The quick rebound in US yields does not prove by itself that inflation is out of control. It does, however, suggest that investors are not convinced the problem has gone away. The United States now carries more than US$40 trillion in public debt, while large budget deficits mean it must continue issuing enormous amounts of new bonds. If the supply of debt grows faster than investor demand, the government may need to offer higher returns to attract buyers.
This matters in Australia because the US bond market helps set the price of money around the world. When American bond yields rise, Australian bond yields can be pulled higher with them. That can feed into fixed mortgage rates, business loans and the Australian Government’s own borrowing costs, even when the RBA has not changed the cash rate.
Australia’s debt position is far smaller than America’s, but the direction deserves attention. Commonwealth debt briefly reached approximately $1.001 trillion this week, although a bond maturity is expected to pull it back below that level temporarily. Crossing the trillion-dollar line is therefore partly symbolic, but it still highlights how much debt has accumulated and how exposed future budgets are to higher interest costs.
This also shows why inflation cannot be blamed entirely on households spending too much. Consumer demand matters, which is why the RBA raises interest rates to encourage people to borrow and spend less. However, inflation can also be driven by government spending, higher energy prices, supply shortages, wages, housing costs and a weaker Australian dollar.
If governments continue spending more than they collect, they must generally borrow the difference. That money continues flowing through the economy even while households are being asked to tighten their belts. Government spending may be necessary for infrastructure, healthcare or essential services, but when the economy is already operating near capacity, additional spending can compete for workers, materials and services, keeping prices higher.
Higher government debt then creates another problem. More tax revenue must be used to pay interest, leaving less available for services or requiring further borrowing. Australia is nowhere near the scale of the US debt problem, but the same basic pressure can begin to develop if debt and interest costs keep rising together.
Against this background, gold has enjoyed another strong week. Australian gold climbed almost $300 to approximately $6,365 per ounce, prompting investors to ask whether the next stage of its recovery is beginning.
The move is encouraging, particularly after the uncertainty gold experienced earlier this year. Concerns about government debt, inflation and the long-term value of paper currencies all provide support for bullion. Australian investors also receive an additional layer of protection when the Australian dollar weakens, because gold is priced internationally in US dollars.
One strong week does not guarantee that gold will continue rising without interruption. Higher bond yields can sometimes place pressure on bullion because bonds begin offering investors a more attractive return. However, if those higher yields are being caused by concerns about debt, inflation and confidence in government finances, gold can still benefit as investors look for an asset that cannot be created through additional borrowing.
For Australian investors, that is the connection worth watching. Gold is not simply responding to overseas headlines. It is responding to the same debt, inflation and currency pressures that can influence Australian mortgages, household costs and the value of our savings.
Government debt does not automatically create inflation. The effect depends on what the borrowed money is used for and how much spare capacity exists in the economy.
Borrowing to improve roads, ports, energy supply or productivity can help the economy produce more over time. However, heavy spending in an economy already short of workers, housing or materials can increase demand faster than supply. More money then competes for the same goods and services, placing upward pressure on prices.
This is why controlling inflation cannot fall entirely on mortgage holders and household spending. Interest rates reduce private demand, but they cannot directly fix high government spending, oil shocks, housing shortages or a falling Australian dollar. If these other pressures remain, the RBA may need to keep rates higher for longer, even as households are already cutting back.
Australia’s $1 trillion debt milestone is not a sign of an immediate crisis. It is a reminder that government borrowing has a cost, and that cost becomes much more noticeable when bond investors begin demanding higher returns.
