And that's the reason why UK rates are so low. Relatively few people meet the conditions of both wanting to move (for cultural or family reasons, say) and being able to move (visas being the main impediment here - as someone who considered it 15 years ago, moving to the US to work is no walk in the park).
I'm not optimistic, but if the UK and US ever do a trade deal, an Australian or Canadian style deal that allows more freedom of labor would certainly be interesting.
