Most Obvious Avoidance of Wealth Tax: Renounce Citizenship

It is a bit bizarre that in the various discussions of a wealth tax no one mentions the most obvious way that rich people can avoid paying: renounce their U.S. citizenship. This would make them completely exempt from a U.S. wealth tax.

While Warren's proposal, and presumably Sanders' as well, would include a steep exit tax on the wealth of people renouncing their citizenship, this would only apply after the tax is in place. While there is little reason to believe that most billionaires are especially bright, it un...