&gt; The same salary, when offered to a British expat and an American, is much less attractive to the American because of the 30+% tax burden imposed.<p>There&#x27;s a ~100k foreign income tax exemption and many countries have tax treaties with the US which bypass even that and give a US tax credit corresponding to the already taxed foreign income.<p>Big issues are there are constraints on the time you can spend in the US (too much holiday there and you&#x27;re not considered living abroad) and there&#x27;s the additional burden of caring for and declaring your income to the US, most expats don&#x27;t need to be involved with the home country aside from grousing about it and renewing their passport.