I've always thought that PhD students should band together and refuse to run experiments for one week. The shock that might have on the current academic system, when administrators, managers, supervisors and project leaders start to realise that their careers depend on a constant supply of dependent serfs might shake things up.
There is no shortage of delusional people eager to sign up for this kind of serfdom.
The US takes 1.2 million immigrants a year, but it is extremely difficult to gain admission as a random applicant without family connections.
One possible way for in is graduate degrees in STEM fields. There are various work visa programs that are far easier to access through STEM graduate school in the US. You can get here on a student visa, gain some connections, interview on campus, and perhaps get a work visa through a tech employer - and this is easier with a grad degree, as those degrees grant certain exemptions from visa caps. If you remain in the good graces of your employer or university, you may eventually qualify for a green card.
It's a slog, but keep in mind, we're not talking about people with freedom of choice here. It might be more rational to sell real estate, open a sandwich shop, or become a dental hygienist if you were allowed to do so legally without fear of deportation.
But if your options are very limited due to visa and immigration restrictions? Sure, it can be highly rational to pursue a graduate degree in a narrow subsection of STEM fields. Unfortunately, as long as universities have this power, they probably won't have much incentive to make the degrees rational for people with the freedom to choose their careers.