Renouncing citizenship

Did Eduardo Saverin do anything wrong?

Because:This is not something I will be doing anytime soon or probably ever, but the U.S. is the only country whose citizens are subject to domestic income tax even if residing outside the U.S. I had to report when I left Argentina, where I went and for how long, as well as details like how much I paid in monthly rent down here in Buenos Aires. Big Brother reaches far. Here in Argentina you don’t file for taxes; the government just takes out directly each month what it needs for your medical insurance and whatever else and that’s that.