<p>I realize this is a peripheral point, but to come back to grad TA's.</p>
<p>I suspect undergrads TA's are paid less, but I don't have figures. However, it is not a matter of money spent on grad students, vs no spending if they use undergrads.</p>
<p>If the university uses undergrad TA's, and pays them less than grad students, then the total instructional expense will be lower, but not at all clear that the educational experience would be inferior. Ask anyone who has tried to understand their math section leader who could barely speak English.</p>
<p>Not all grad students are headed for academic careers. First of all, many are in masters programs, and have no intention of joining college faculties. Second, even those in doctoral programs have lots of job opportunities outside of academia. In many fields, academic jobs are rare and industry work is plentiful.</p>
<p>As this discussion points out, a university being rich does not determine where it chooses to spend money. The most important thing for students in a research doctoral program is that they get their research done and get their degrees. Time spent teaching contributes nothing to this, and that is why it is a good thing if the student is supported on research funds-they focus 100% on their research.</p>
<p>It is not that the universities cannot "afford" to support a graduate student without them teaching, it is that universities do not work that way. </p>
<p>The graduate student would belong to a department or graduate group. It would be up to that group to pay them. The university could have zillions, but if the department had no funds to support the student without teaching, then the student would have to teach, and spend a significant portion of time away from their research. The department is expected to fund its graduate students through research grants, outside fellowships, and teaching. Only teaching brings in university money (since this derives from tuition). So a department in a rich university easily could be without funds to support all its grad students without teaching. In fact, this is common.</p>
<p>Recent construction could easily inflate depreciation, since this is higher for newer buildings.</p>