You know what? Let them leave. If they have business here, are they going to close shop and forego this market? No, they aren't. Can we still tax them for what they remmit to whatever the place they are? Yes, we can.

And where they will go? Once a major developed nation starts being serious on taxing the billionaires, the others will follow soon, or more probably, they will even coordinate among themselves to harmonize their rates.

Yeah, they could go to some third world hellhole where they could bribe the authorities and live in a Pablo Escobar's style compound. Will they do it? Will they subject themselves to the judicial insecurity that abunds in those places? To politician that manage the incredible feat of being orders of magnitude even more corrupt than the ones we have in washington?

All western nations used to have far higher top marginal rates for income and inheritance taxes. Far less loopholes, and yet here we are.