No real problem, again.
We don't train people, there are none to worry about their jobs. Colleges and grad sschools are already filling much, maybe most of their science spaces with foreign students.
Good American scientists can also vote with their feet and go where the research dollars are. It's called brain drain.
The application of the scientific methodology using survival of the fittest has been in place in our public education since government deemed it credible.
The results are plain to see government must care for the least fit.