How about UK

Oxford as recently doubled the proportion of its overseas students to 15%. At the London School of Economics 75% of graduates students are from abroad.

Clever rich or both almost every country in the world has some sort of program to attract desirable migrants. UK has two programs one for the rich who have to invest LST.750000 ($1.4mio) in actively traded securities and one much larger for talented foreigners. Both have worked well. Unlike some other countries U.K. doesn't make applicants finded job first. With good qualifications, they can just turn up and look for work, that helps keep U.K. economy flexible and competitive.