Decision time for the GST is drawing dear. No doubt there will be a number of unforeseen consequences which will require fixing after the event. All the modelling and Senate inquiries in the world will not be able to fully predict human behaviour and the introduction of a new tax will inevitably affect economic behaviour which will in turn affect the impact of the tax. The Government has made the obligatory promise that no-one will be worse off. The promise is obligatory because in modern politics every interest group is capable of squealing disproportionately to any inconvenience change might bring. The promise is silly because inevitably such a major change cannot be beneficial to everyone. So the promise must be taken with a grain of salt.
Of more importance is the question of whether the tax changes overall will on balance be beneficial. The answer to that question is almost certainly yes. Australia must change its tax mix. It must broaden it to include services and it must tax the act or consumption more and the acts of wealth generation, like income and employment, less.
The last days of Senate hearings were taken up with the question of compensation for pensioners. As the Government had made a separate promise that the pension would reach 25 per cent of average weekly earnings, any compensation would get absorbed in that and they would be no better off under the GST. Indeed they would be worse off because their pension would not buy as much if food were taxed. This may be so. The answer would be to increase the pension promise a few percentage points to account for the GST, so that the pension would be 27 or 18 per cent of weekly earnings.