Voting with their feet to avoid taxes: How much money do you think that the Federal Government lost by this person renouncing his US citizenship?

The US will still force him to pay some taxes (a so-called exit tax), but even with that tax it still pays him to give up his US citizenship.  Is this what you want?  The brightest, wealthiest people to leave the country?  From Bloomberg:

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.
Facebook plans to raise as much as $11.8 billion through the IPO, the biggest in history for anInternet company. Saverin’s stake is about 4 percent, according to the website Who Owns Facebook. At the high end of the IPO valuation, that would be worth about $3.84 billion. His holdings aren’t listed in Facebook’s regulatory filings.
Saverin, 30, joins a growing number of people giving up U.S. citizenship, a move that can trim their tax liabilities in this country. The Brazilian-born resident of Singapore is one of several people who helped Mark Zuckerberg start Facebook in a Harvard University dorm and stand to reap billions of dollars after the world’s largest social network holds its IPO. . . .
Saverin’s name is on a list of people who chose to renounce citizenship as of April 30, published by the Internal Revenue Service. Saverin renounced his U.S. citizenship “around September” of last year, according to his spokesman.
Singapore doesn’t have a capital gains tax. It does tax income earned in that nation, as well as “certain foreign- sourced income,” according to a government website on tax policies there. . . .