Second, a rise in inflation will act "like a tax, taking money from families and giving it to the government."
"That first factor is boosting the size of the pie being taxed, and the second is increasing the taxman's share.
"The uncomfortable fact is that war is a moneymaker for the Australian federal budget - partly because war boosts inflation (which effectively acts as a tax), but mostly because the war has bid up the price of what Australia sells to the world."
Richardson estimates the effect will likely be smaller-than-budgeted deficits this year ($6 billion smaller than the official forecast of $37 billion), next year ($20 billion smaller than the forecast $34 billion), and the year after ($9.6 billion smaller than the forecast $36 billion). But, he says, the deficit may be bigger than budgeted (by $5.6 billion compared to the forecast of $36 billion) in 2028-29 as war-driven budgetary positives pass.
Also "net debt is set to be a smaller share of national income than the official forecasts had it being.