The number of rich expat Americans who are renouncing their citizenship has increased as a result of new banking regulations:

Rich Americans renouncing U.S. citizenship rose sevenfold since UBS AG whistle-blower Bradley Birkenfeld triggered a crackdown on tax evasion four years ago.

About 1,780 expatriates gave up their nationality at U.S. embassies last year, up from 235 in 2008, according to Andy Sundberg, secretary of Geneva’s Overseas American Academy, citing figures from the government’s Federal Register. The embassy in Bern, the Swiss capital, redeployed staff to clear a backlog as Americans queued to relinquish their passports.

The U.S., the only nation in the Organization for Economic Cooperation and Development that taxes citizens wherever they reside, is searching for tax cheats in offshore centers, including Switzerland, as the government tries to curb the budget deficit. Shunned by Swiss and German banks and facing tougher asset-disclosure rules under the Foreign Account Tax Compliance Act, more of the estimated 6 million Americans living overseas are weighing the cost of holding a U.S. passport.

Good.

If they renounce their citizenship, they cannot make political contributions to buy legislators.