You're assuming things about op that can't be gotten from the post. How do you know their lineage? They could be descended from any number of people who didnt enjoy those spoils either. The only thing is that they're "wealthy" enough to go to college and emmigrate.

Also, exodus of skilled workers has been a weapon employed by the imperialist nations for decades now. From east Berlin to former yugoslavia brain drains have been an active threat. Why can't progressive people act in the same way?

And it's a wierd catch 22, you're not allowed to leave and live in a self sufficient country that doesn't rely on mass imperialism, but also if they live in the imperial core they're morally responsible for the system they were born into.