Baby boomer spending shows why GST must be lifted

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A perfect storm of financial headwinds has severely impacted Australian households.

The Reserve Bank of Australia’s (RBA) aggressive interest rate hikes have driven mortgage rates up by more in Australia than almost any other nation:

Outstanding mortgage rates

As a result, mortgage holders are dedicating a record high share of their incomes to mortgage repayments:

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Housing mortgage repayments

Australian tenants are also being hammered by soaring rents, courtesy of the Albanese government’s record immigration program:

Asking rents
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Australian households have also been hit hard by rising income tax payments courtesy of bracket creep and the expiry of the lower-middle income tax offset:

Household taxes

The culmination of the above pressures, alongside Australia’s relatively weak wage growth, has caused a sharp fall in real per capita household disposable income.

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Global wage growth

Source: AMP

Australia’s real per capita household disposable income fell by 6% last year, one of the biggest declines in the world:

Household disposable income
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Meanwhile, Australian employee households have experienced the sharpest increase in their cost-of-living, which rose by 6.5% in the year to March 2024:

ABS cost-of-living indices

This 6.5% rise in employee household cost-of-living easily exceeded the 3.6% increase in CPI inflation or the 4.1% rise in the wage price index over the same period.

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While working Australians are being buffeted by rising taxes, interest rates, and cost-of-living, older Australians are travelling well.

As illustrated in the chart directly above, the cost of living for self-funded retirees and aged pensioners rose by only 3.4% and 3.3% respectively in the year to March 2024, below the 3.6% increase in CPI inflation.

These cohorts typically own their homes outright, therefore, they have remained relatively untouched by surging mortgage repayments, rents, and personal income taxes.

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Older Australians have also increased their spending by more than inflation, while younger Australians have been forced to cut their spending in real terms:

Change in spending by age

This spending by older Australians is helping to keep CPI inflation elevated, which is preventing the RBA from lowering interest rates and, thereby, is hurting younger Australians carrying mortgages.

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The above data highlights why Australia should raise the rate of GST to 15%.

Doing so would pull wealthy older Australians into the taxation net, reduce the reliance on personal income taxes, and slow spending and aggregate demand (other things equal).

Equity concerns—for example, the impacts on lower income earners or Australians on fixed incomes—could be mitigated with direct fiscal transfers or rebates to these groups.

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Raising the GST in this way would certainly be much fairer than continually punishing one-third of Australians carrying owner-occupier mortgages with higher interest rates and punishing working Australians with forever higher income taxes.

The tax system, as it is currently set, is an all out war on youth and working Australians.

About the author
Leith van Onselen is Chief Economist at the MB Fund and MB Super. He is also a co-founder of MacroBusiness. Leith has previously worked at the Australian Treasury, Victorian Treasury and Goldman Sachs.