The Indians (and Chinese) who fill graduate schools here might move back to their native lands at gunpoint, but no other persuasion would work.
They're here to stay.
When I was in grad school, the takehome on a monthly stipend was about $750. In those days it was enough to have an apartment and food and not a lot else.
The Chinese students, of which there were many, would cram 10 people in a two-bedroom apartment and they'd each send about half of their stipend home.
Because in mainland, real China, $300 American was a CRAP-TON of money.