But it can be affected by extreme prices changes that don’t represent the general price pressures on the economy, so “for policy purposes” (that is, for its decisions about changing the official interest rate) the Reserve focuses on a measure of “underlying” inflation called the “trimmed mean”.

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This excludes the 15 per cent of prices that rose the most during the quarter and the 15 per cent of prices that rose the least or fell.

By this measure, prices rose by 1.4 per cent during the quarter and by 3.7 per cent over the year. This is the highest it’s been since 2009, and well above the Reserve’s 2 to 3 per cent target range.

It’s standard behaviour for incumbent politicians to claim the credit for anything good that happens in the economy during their term, regardless of whether they’re entitled to.

So it’s only rough justice for opposition politicians to blame the government for anything bad that happens – which is just what Labor’s been doing this week.

But Scott Morrison and Josh Frydenberg have been arguing furiously that the leap in most prices has had nothing to do with them. And I think there’s a lot of truth to their claim.

Let’s look at the particular prices that do most to explain the March quarter jump in living costs. The biggest was a 5.7 per cent rise in the cost of newly built houses and units.

This has been caused by shortages of certain imported building materials due to pandemic-related disruptions to supply, worsened by a surge in demand for new homes arising from the authorities’ efforts to counter the “coronacession” by cutting interest rates and using HomeBuilder grants to keep the building industry moving.

Next in importance in explaining the surging cost of living is an 11 per cent rise in the cost of petrol and diesel fuel, caused by Russia’s war on Ukraine. These prices are up 35 per cent over the year to March.

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The higher world oil price has also raised fresh food prices by increasing the cost of fertiliser, as well as increasing the cost of transporting many goods. The pandemic has temporarily increased the cost of international shipping.

Third in importance this quarter is a 6.3 per cent increase in university fees caused by a federal government decision last year.

Add in the 12 per cent annual rise in beef and lamb prices caused by graziers’ restocking following the end of the drought and you see that most of the rise in living costs so far comes from factors far beyond the government’s control.

So, are Morrison and Frydenberg off the hook on rising living costs? No. People feel the pain of rising prices more acutely when their wage rises haven’t been keeping up, let alone getting ahead.

In a well-managed economy, workers’ wages rise a little faster than prices. This hasn’t been happening, particularly in the past two years or so, and the government has made no attempt to rectify the problem.

Raising interest rates can do nothing to fix all the problems we’ve noted on the supply-side of the economy. The only thing they can do is dampen the demand for goods and services by increasing the cost of borrowing and by leaving those people with mortgages with less disposable income to spend.

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Which is an economist’s way of saying what everybody knows: that higher interest rates add to the living costs of the third of households paying off a home loan. Those who’ve taken on loans in recent years will feel it most.

Of course, all those people living off their savings will be cheering the return to rising interest rates. But from an economy-wide perspective, the winners are far outweighed by the losers.

Ross Gittins is the economics editor.

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