Europeans: If it is better to live in the EU then US, how come there was never an American migration to Europe?

Hmmmmm All I can say is Im British and I try to deprive myself of many pleasure in life until I have earned them. Therefore I dont care if everyone in this world has more opportunities or a better life style because I was brought up to believe you are not a man unless you sacrifice some of your privileges to build character. Im not blind I just dont care.