I don’t fault Eduardo Saverin at all for doing this. Our tax system on expats is absurd and has gotten even worse this year. If you’re living in the US, of course you need to pay taxes. However, if you’re living, working and paying taxes in Singapore–or England, say–you shouldn’t have to also pay US taxes in the same year. As far as I know, the US is the only country that punishes its citizens in this way.