You're not even thinking low enough -- I was a math grad student with a $22k stipend at a well-respected engineering school, and I was the lead instructor for t

You're not even thinking low enough -- I was a math grad student with a $22k stipend at a well-respected engineering school, and I was the lead instructor for three auditorium-sized sections of Calculus and Diff EQ a year (fall, spring, summer). I'm far from understanding the financials of running a school but something always seemed off to me there. I guess technically our grad student tuition was being paid too, but after the first year that basically amounted to a spot in a cubicle farm and a bi-weekly meeting with my advisor.