Why do we pay for foreigners education?

[goofball]

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TA's, RA's, research assistants, graduate assistantships, all of those are paid for with federal tax money. Why then, do Americans pay for so many foreigners education? If you see a foreigner in a graduate program, odds are we are paying for their education. It doesn't make sense to me at all.

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It's called educating intelligent people so they can, you know, cure cancer and stuff.

Besides, they do work, usually they teach unintellgible quiz sections.