They're closing the stable door after the horses have bolted.
Sen. Chuck Schumer, D-N.Y., has a status update for Facebook co-founder Eduardo Saverin: Stop attempting to dodge your taxes by renouncing your U.S. citizenship or never come to back to the U.S. again.
In September 2011, Saverin relinquished his U.S. citizenship before the company announced its planned initial public offering of stock, which will debut this week. The move was likely a financial one, as he owns an estimated 4 percent of Facebook and stands to make $4 billion when the company goes public. Saverin would reap the benefit of tax savings by becoming a permanent resident of Singapore, which levies no capital gains taxes.