TL;DR: The RBA unanimously raised the cash rate 25 basis points to 4.60%, a 15-year high and the fourth hike this year. Chalmers blames a US-Iran oil war for turbocharging fuel costs. Bullock says inflation was already driven by domestic capacity pressure and excess demand. Markets still watch November; CPI is due Wednesday.
Status note: Checked 30 September 2026 against ABC News coverage of the post-decision blame fight. The Wednesday CPI print and any November RBA decision can still move rates and the politics.
The hike, in brief
On Tuesday the Reserve Bank board voted unanimously to lift the cash rate by 25 basis points to 4.60%. That is the highest cash rate in 15 years and the fourth increase this year. For borrowers, the mechanical hit is concrete: on a typical $600,000 mortgage over 25 years, repayments rise by about $91 a month.
AMU already covered the decision itself. What moved on Wednesday's briefing cycle is the argument over causes. Chalmers accepted responsibility for his part of the story and then named the US war with Iran as the force that turbocharged fuel prices. Bullock refused a blame game and put domestic capacity pressures first, with the oil shock as an add-on. Taylor called government spending a major culprit.
Chalmers' frame: oil war, private demand, and repair jobs
Chalmers said Australians are paying a hefty price for the fuel shock tied to the US conflict with Iran. That line tries to separate a global energy blow from a purely domestic policy failure. He also pushed back on spending-as-villain arithmetic. The headline spending figure, he said, obscures that the private sector accounted for four of every five dollars of demand last year.
On the government's to-do list he pointed to a productivity package, repairs to the National Disability Insurance Scheme (NDIS), and cost-of-living help. Productivity is the economist's word for how much output the economy gets from the same hours and machines. When it stalls, prices and wages can heat up faster for the same growth. Chalmers is selling repair and support as the fiscal answer while rates do the monetary heavy lifting.
He did not claim the budget is irrelevant. He claimed the demand mix is mostly private, and that the oil war is the accelerant households feel at the bowser.
Bullock's frame: excess demand came first
Bullock said she will not play the blame game. Her account is colder. Inflation, she said, has been driven by domestic capacity pressures. The oil shock sits on top of that. Then she drew the line markets and voters both needed to hear: "This isn't all about the Middle East conflict… we did start from a position of excess demand… raising rates even before the conflict."
Excess demand means too much spending chasing goods and services the economy cannot supply fast enough. Capacity pressure is the same idea from the supply side: factories, labour, and housing already stretched. In that telling, the RBA was tightening before Iran war oil prices jumped, because the domestic starting point was already hot.
Bullock was blunt on productivity: it is doing nothing. She said costs linked to the Iran war will persist longer. People are rightly annoyed. The best thing the Bank can do, she said, is get inflation back to the 2-3% target band. That is the governor's job description in one sentence: not score political points, hit the inflation band.
Taylor's charge and the budget ratios
Angus Taylor said the government is spending too much and called that a major culprit for the inflation mess. The figures in the same ABC package give the opposition a chart to wave. Government spending was 26.9% of GDP in the last financial year, the highest in four decades aside from the pandemic years. The tax take was 24.1% of GDP, near a Howard-era record.
Those ratios do not, by themselves, prove Taylor's causal claim. Chalmers' reply is that private demand was four-fifths of the story last year. Bullock's reply is that the Bank was already fighting excess demand before the oil war. The politics still run on the ratios because they are easy to put on a graphic: spending high, tax take high, rates at a 15-year high.
For renters and mortgage holders, the abstract fight lands as the $91 monthly step and whatever fuel does to Wednesday's CPI. The blame contest is about who owns that bill.
What comes next on prices and rates
Markets are not ruling out another hike in November. The next near-term data point is Wednesday's consumer price index, expected to show a jump in fuel. CPI is the basket that tracks how fast living costs rise. A fuel spike can lift the headline even when other parts of the basket cool.
Bullock's message to households who are "rightly annoyed" is that lasting relief runs through inflation at 2-3%, not through a single press conference. Chalmers' message is that the oil war turbocharged the pain and that private demand, plus productivity and NDIS repair, should frame the fiscal debate. Taylor's message is that the spending share of GDP is the smoking gun.
All three can be true in pieces without settling the whole argument. Domestic excess demand can predate an oil shock. An oil shock can still dominate the monthly fuel line. High government spending as a share of GDP can coexist with private demand providing four of five dollars of last year's demand. The RBA's unanimous 4.60% decision sits under all of that.
Where things stand
As of 30 September 2026, the cash rate is 4.60% after a unanimous 25 basis-point rise, the fourth this year and a 15-year high. A typical $600,000 25-year mortgage costs about $91 more per month. Chalmers accepts a share of responsibility, stresses private demand and Iran-linked fuel, and points to productivity, NDIS repair, and cost-of-living help. Bullock rejects a blame game, says excess demand and capacity pressure were already in play, and wants inflation back in the 2-3% band. Taylor blames government spending. Spending at 26.9% of GDP and a 24.1% tax take are the budget numbers in the fight. Markets still price November risk. Wednesday's CPI is expected to show a fuel jump.
A rate rise is not a verdict on which politician "caused" inflation. A fuel-led CPI print is not proof that domestic demand never mattered. The settled facts are the 4.60% cash rate, the unanimous board, the mortgage arithmetic, and the three public frames now on the record.
Sources: ABC News on Chalmers, Bullock, and the inflation blame fight after the RBA hike.