There are other countries where this is the case. There are of course varying amounts of tax modulation, but you are generally expected to pay some amount of mo

There are other countries where this is the case. There are of course varying amounts of tax modulation, but you are generally expected to pay some amount of money even if you work overseas. You are a part of keeping your country running smoothly, and you pay taxes for that. If you want to be part of another country running smoothly, you can do so (some have very low taxes but are generally not super great to live in for varying reasons). I have no idea about the process for relinquishing US citizenship.