Maybe survivor's bias? I assume you live in the USA. The europeans that FANG bothers to move across the pond might be only the really good ones attracted by the

Maybe survivor's bias? I assume you live in the USA. The europeans that FANG bothers to move across the pond might be only the really good ones attracted by the top payment. The mediocre europeans don't make it and thus remain in europe, outside of your view. Different culture, different success measures, red tape around visas, etc. all put larger cost onto international hires vs just hiring domestically.