The top rates today are slightly, very slightly lower than the rates of the Clinton era. I paid those rates and the cheap mother****ers can pay the same or yeah, Tigger is right, bar them from drinking our blood again and let them enjoy the taxless country they found to live in instead.
Nobody likes paying taxes. Nobody.
Basically, I'll guess that FATCA (which I first heard of was now in this thread) will expose their hidden assets that aren't accounted for in their tax returns. Extradition for tax crimes probably isn't all that easy. So, good time to make the break and drink pina colada served by nubile cocktail waitresses on the beach in Spain.
I only paid taxes because I was afraid of the consequence of fibbing. I saw people get 11 years Fed time. I didn't pay them because I love my fellow citizens. I just follow the law. Paying taxes is unfortunate, but not catastrophic.