If you create an economic incentive to go into math an science you will have no trouble attracting good people. But, for years, it has been a race to the bottom where the US over-produced researchers, scientists etc.. But then to put salt in the wound it also imported more of them to drive the wages down further. As more people have flooded in to STEM at bargain basement prices, the quality of the research has also gone down.
All of this was by design so that big corporate interests could get cheap labor and increase profits. Since the US government is for sale to the highest bidder, and the corporations have no loyalty to the country, they will feed off the host until it can no longer sustain itself and then look for another host to feed off of.
This is the most interesting part of the way the US government is structured. Where the federal government has very little power compared to the states, each state is competing for talent. Like how Texas is more conservative and California is more liberal. May the best policies win. People will move to whichever set of laws better produces success. I don’t think that as true as it once was though.