> The US is an economic powerouse, it attracts top talent in every area or level because it offers opportunities and high rewards.
The US is an educational powerhouse, and we attract top talent, sometimes charge money to educate these visitors (undergraduate and graduate work quite differently), and then, wait for it, we kick the people we educated back out.
Seriously, check out the visa types linked from here:
https://educationusa.state.gov/foreign-institutions-and-gove...
I don’t know the history, but if I was in charge of a non-US country trying to import skills, maximize my country’s future success, and even slowly weaken the US, I would love these rules. If I were a US lawmaker, I would struggle to invent a more self-destructive, not to mention inhumane, policy.
So, in answer to your comment, no, our educational system is crap at retaining the top talent it attracts, because the US made it mostly illegal for that talent to stay here.