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

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.