Worse than this, they charge faculty grants this amount. Beside the percentage, they take from the grant itself. On average, we are talking about the university taking anything between 50-70% of any effective money for research. The other 30% pay for student's stipend, research expenses and equipments.
And even worse than that, there's a good chance that most of the grad students being charged for "tuition" in this case aren't even taking any courses for most of the semesters they're in grad school. I have no doubt some of these students are being charged huge tuition bills without being enrolled in a single course.
