China supplies a lot of foreign students who all pay large amounts in tuition fees to foreign universities

True, but the real flipside of this is it means less places for students who are born in said country to study.

Also most won't pay any income tax, they simply don't play by or feign ignorance and pretend not to understand those rules, and send back home most of any earnings, while sharing a house and living cheaply.

This is wrong imho.