But that actually proves his point that if you are starting from an insanely high rate of marginal taxation then *decreasing* the top rate
*increases* the overall tax take. This only holds for marginal rates of taxation in excess of about 80% (you can haggle +/- 10% on this figure). [the difficulty is in predicting how much the economy will be grown]Pop groups were tax exiles back then and much more recently Gerard Depardieu has moved to Belgium/possibly taken Russian citizenship to avoid punitive French taxes. Luxemburg strikes me as a nicer choice...
Basically making it easier to pay local income taxes than hide everything illegally using very expensive boutique no-questions asked accountants and anonymous numbered Swiss bank accounts then ceases to be quite so attractive to the hyper rich.
Swiss bank Wegelin being busted recently and criminal tax evaders outed has really put the wind up them though so no need now to bid too low.
The most effective high marginal rate is somewhere around the 80% mark as a corollary of Pareto's law. Namely that the richest 20% get to take home >80% of the cake. Personally I think a 50% top rate is pushing it. YMMV
It is actually a result of scale invariance in a power law distribution of incomes but the 80:20 law and is a very good heuristic. Pareto originally derived it from Italian land ownership statistics but it applies a lot more widely and to many other problems.
No matter what you do hyper rich elites and corporate multinationals will buy services and bribe politicians to avoid and evade paying their fair share. As the delightful hotelier Leona Helmsley so eloquently put it "We don't pay taxes. Only the little people pay taxes...".
Depends on whether your tax rates are too high or too low at present.
USians think their taxes are too high, but most civilised countries have higher income taxes and much better public services like universal healthcare and properly maintained roads and bridges.