How about a 5% anti-Chuck-Schumer tax, whereby any elected representative would be charged a 5% higher marginal rate if it could be shown that he had been proposing bills for show rather than for use.
But yeah, this seems like something that is both extremely rare and Not A Problem.
As Federal Income Tax, Capital Gains Tax, and Qualified Dividend Taxes increase, we will most likely see more of these flight-from-tax acts, not fewer.
George Soros is alive and kicking living in Upper East Side, Manhattan; Bedford, Westchester county; and East Hampton, Suffolk county. If you are lucky you can bump into him very often in Bloomberg Headquarter. And George Soros is also a proponent for Buffett Rules.
(I'm actually rather embarrassed to have made this mistake)
And, anyway, it seems like a more-or-less solved problem with the Exit Tax.