When we’re reminded that income tax cuts represent merely the partial return of the proceeds of earlier bracket creep, and that the process of clawing back the latest tax cut starts the same day it arrives, it’s easy to join the impassioned cry for tax reform. Sorry, it ain’t that simple.

Surely if we could end the crazy business of bracket creep, we’d pay less tax? Well, yes – but no.

Bracket creep occurs because our income tax scales ignore the reality of inflation. When our wages rise to take account of inflation, we’re no better off in real terms, but we’re often pushed into a higher tax bracket, which raises the average rate of tax we pay on the whole of our income. (If we’re not literally pushed into a higher bracket, our average tax rate still goes up because a higher proportion of our income is now taxed at a higher rate.)

So we’ve long known how to (largely) end bracket creep: do what the Americans do and increase all the bracket limits once a year, in line with the annual increase in the inflation rate. Then, it would only be rises in your real income that pushed up your average tax rate, which is fair enough.

Mission accomplished. Now we’ll all be paying less tax.

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Except that the net profit the taxman makes after all the to-ing and fro-ing on bracket creep isn’t just kept in a jam jar somewhere. It’s used to help cover the ever-growing cost of all the services the government gives us, and thus to limit the size of budget deficits and government debt.

So, without the benefit of bracket creep, governments would be forced to keep making explicit increases in the rates of income tax, or to announce new taxes.

Wouldn’t that be an improvement? In principle, yes. In practice, our (politician-fed) aversion to paying higher taxes would just make politics an even bigger shoot-fight than it already is. The pollies would spend more time abusing each other and less time getting on with fixing our problems.