There was a similar question being discussed here -> https://lemmygrad.ml/comment/4185356

I will quote the comrade as a quick TLDR:

100K debt to the american gov’t only matters if you ever plan to use credit in America. Paying off these people’s debt just allows them to return to America and use their education to buy a house in America, get a job in America, and support the American empire.

Also it’s especially funny if the reason they can’t return is entirely because America decided to saddle the very people they need to function with undischargable debt they have no hope of paying back.