Your tone would suggest that people are discouraged from denouncing their US citizenship because they will ultimately be the losers in that transaction.
How many US schmucks will it take to offset this single losers tax bill. And he isn't the only one doing this. Perhaps you over estimate "the greatest country int he world".
"Eduardo Saverin, the billionaire co- founder of Facebook Inc. (FB), renounced his U.S. citizenship before an initial public offering that values the social network at as much as $96 billion, a move that may reduce his tax bill."