Weren't many South Asians, et, to an extension, East-Asians brought to the U.S.A and historically Great Britain and its colonies, specifically for their petty bourgeois, intelligentsia, et labor aristocrat/PMC status... which itself is a result of brain drain

I mean, it explains why a lot of them are more successful

That being said, it's not a general rule

(I can find examples though)

Eg. Rishi Sunak, descended from an Indian PMC family that lived in British Africa, now is Prime Minister of Britain....