A lot of the smarter people I know have been recruited into Europe. People say "the salaries are so much lower lol", but the reality is, you often have employment laws that remove terrible occurrences as possibilities that are commonplace in America, you have access to healthcare, being a home owner is actually possible and if you don't want that renting is better overall. European culture is usually way less cut throat, and managers typically know their stuff, rather then failing upwards to half a million dollar salary's where using the word "digital" and being a brute is the main requirement.

Salary isn't everything. European engineering is a pretty different culture.

The way the us tries to prevent this is by crippling their people with student debt.

I don't have any student debt pressure, but I'm debating trying to do the same. I have a lot of friends in Denmark and no strong ties to the US. I'm about to hit my forties and it's probably now or never.