Comment by webdevver

nobody is going to stop you leaving the UK.

its entering another country that suddenly becomes a real problem, and ofcourse, if you're in the UK, the only country worth moving to at that point is the US with (as I understand) quite stringent immigration restrictions.

in reality, if the US were to open their doors to the UK, holy moly - this entire country would turn into Ukraine overnight, with nobody but pensioners left. which actually isn't in either governments interest: obviously not the UK, but infact, the UK presents a source of cheap labour for the US: read any hackernews thread concerning tech wages in the UK, the comments are hysterical/diabolical ("you make HOW much!?" - "A fast food worker makes more..." - etc.)

so, the current state of affairs is probably a good business arrangement for both parties involved, and aren't gonna change any time soon.