Michael Cullen has set a platform for personal tax: at least this year’s levels. His promise to raise bracket thresholds in 2008 and every three years thereafter — but not cut rates — embeds the huge rise in tax over the past five years.
And the platform will likely rise. Cullen is to raise thresholds by 2 per cent a year, the midpoint of the Reserve Bank’s target. But since inflation has almost invariably run above the midpoint and since wages run faster than inflation, the thresholds will continue to fall behind and most taxpayers will year by year pay a higher cut of their income in tax.