Superannuation Reform Again?

Changes to superannuation are a perennial topic. If the government does this - lower the threshold for the 30% super contributions tax to $180k income per year and cut the concessional cap to $20k p.a. - I figure I will have to pay almost $7,000 a year more in tax. My taxable income this year looks like being just below $180k but the threshold for the super surcharge adds things like employer super contributions and investment losses to the taxable income amount. It would make most sense to cut the non-concessional cap, which is currently $180k per year, dramatically, as that is the way that wealthy people can get really large amounts of money into the super system, which will be taxed at a zero rate once they retire. But, of course, there is no immediate revenue to be gained by cutting the non-concessional cap. To simplify the system the government could just get rid of the concessional/non-concessional distinction, stop taxing earnings and then have a simple US Roth style system. Much too logical, of course. Actually, the optimal solution, assuming that super will be taxed in some way is to go for the US 401(k)/403(b) approach where there is no tax on contributions or earnings and regular tax on payouts. This gives the the money the best opportunity to increase in value... well under some economic assumptions anyway.