tricky dick started this when he lowered tax rates for the rich below 50%
I dont want to drag out a long argument about this because it should just be a simple point. Â The absolute margins of taxation are not as important as the revenue raised and this is very similar across business.
 Its almost always about the revenues and scale of business done not the profit margin possible to levy on a 'customer'.  This can be the mistake many make about capitalism in general but its quite ironic that lowering margins, being efficient can be the most productive and profitable route for a business and even government in this case. Â
I believe the 'Laffer curve' tries to describe this idea and might be the simplest thing to quote but it can be true that high taxation rates nets less tax overall. Â Especially true in this modern global economy, I have no belief trying to capture the rich man dollar like its fish in a net is the path to balancing the budget etc.
 It is a mythical tale unfortunately, it wont be happening in this administration or any other and there is a danger of doing less business then achieving less tax to balance fiscal spending, leading to even more debt for no advantage.
I have seen this curve cited many times. But it is always cited by rich people who do not want to pay more taxes

In my view many countries are simply very lenient when taxing the rich, and very harsh when taxing the middle clases that are less prone to leave the country. The Uk right now has that ongoing debate, but if you ask me about the "non-domiciled" status... it is an absolute bargain for millionaries that has the side effect of raising the price of Real State beyond what is reasonable. Now that is happening in Milan as they flee London.