It isn't quite that simple if you're a US citizen. Clinton closed that loophole. You are still liable for worldwide tax for I believe 10 years if the IRS decide

It isn't quite that simple if you're a US citizen. Clinton closed that loophole. You are still liable for worldwide tax for I believe 10 years if the IRS decides you renounced your citizenship for tax purposes. The US is also the only major country that taxes it's citizens regardless of residence. Yes there is a large deduction, but you still have to file and pay anything over that deduction. The big thing preventing you from moving your money to say Switzerland is that most international banks including those in Switzerland don't dare to touch US clients for the same reasons as described in the document.