this isn’t science, it is story telling

Then put them all in the prisons and enslave them, as is legally allowed per the Constitution. They’ll work with sufficient coercion. Have the CIA seize their overseas assets and repatriate it all, or if it’s in a hostile country, have the CIA exfiltrate or destroy as necessary. Humans will work when enough physical and psychological pain is applied to coerce them. That, too, is human nature. If they attempt to flee, have the CIA find them, put them in unmarked vehicles, and extradite them back to US soil to be put back to work.