“My view has long been that if we were designing optimal policy arrangements from scratch, monetary and fiscal policy would both have a role in managing the economic cycle and inflation, and that there would be close coordination,” Lowe said.

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“The current global consensus is that monetary policy is the main cyclical policy instrument and should be assigned the job of managing inflation. This is partly because monetary policy is more nimble [it can be changed more quickly and easily than fiscal policy] and is not influenced by political considerations.”

“Raising interest rates and tightening policy can make you very unpopular, as I know all too well. This means that it is easier for an independent central bank to do this than it is for politicians,” he said.

“This assignment of responsibility makes sense and has worked reasonably well. But it doesn’t mean we shouldn’t aspire to something better. Monetary policy is a powerful instrument, but it has its limitations and its effects are felt unevenly across the community.”

“In principle, fiscal policy could provide a stronger helping hand, although this would require some rethinking of the existing policy structure. In particular, it would require making some fiscal instruments more nimble, strengthening the (semi) automatic stabilisers and giving an independent body limited control over some fiscal instruments.”

“Moving in this direction is not straightforward, but some innovative thinking could help us get to a better place,” Lowe said.

“During my term, there have been times where monetary and fiscal policy worked very closely together and, at other times, it would be an exaggeration to say this was the case.”

“The coordination was most effective during the pandemic. During that period, fiscal policy was nimble and the political constraints on its use for stabilisation purposes faded away. And we saw just how powerful it can be when the government and the Reserve Bank work very closely together.”

“There are some broader lessons here and I was disappointed that the recent Reserve Bank Review did not explore them in more depth,” Lowe said.

So was I, especially when two of Australia’s most eminent economists – professors Ross Garnaut and David Vines – made a detailed proposal to the review along the lines Lowe now envisages. (If Vines’ name is unfamiliar, it’s because most of his career was spent at Oxbridge, as the Poms say.)

But no, that would have been far too radical. Much safer to stick to pointing out all the respects in which the Reserve’s way of doing things differed from the practice in other countries – and was therefore wrong.

In question time, Lowe noted that one of the world’s leading macroeconomists, Olivier Blanchard, a former chief economist at the International Monetary Fund (and former teacher of Lowe’s at the Massachusetts Institute of Technology), had proposed that management of the economy be improved by creating new fiscal instruments which would be adjusted semi-automatically, or by a new independent body, within a certain range.

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Lowe also acknowledged the way the marked decline over several decades in world real long-term interest rates – the causes of which economists are still debating – had made monetary policy less useful by bringing world nominal interest rates down close to the “zero lower bound”.

How do you cut interest rates to stimulate growth when they’re already close to zero? Short answer: you switch to fiscal policy.

But what other central banks – and, during the pandemic, even our Reserve Bank – have done was resort to unconventional measures, such as reducing longer-term official interest rates by buying up billions of dollars’ worth of second-hand government bonds.

Lowe said he didn’t think this resort to “quantitative easing” was particularly effective, and he’s right. I doubt if history will be kind to QE.

However, there’s one likely respect in which the ground has shifted under the economists’ feet that Lowe – and various academic defenders of the conventional wisdom – has yet to accept: the changed drivers of inflation. It’s not excessive wages any more, it’s excessive profits.

More about all this another day.

Ross Gittins is this masthead’s economics editor.

Ross Gittins unpacks the economy in an exclusive subscriber-only newsletter every Tuesday evening. Sign up to receive it here.