PhDs are probably the leanest degree for a research school to support.
They don't attend classes after ~2 years, mostly operate independently besides consulting with their advisor, don't take anywhere near a professor's salary, teach or TA classes, act as lab technicians, and bring in money through grants.
The costs are mostly upfront in the form of providing the necessary research facilities to attract research-oriented faculty and students, and the administrative staff needed to ensure compliance with grant terms.
>PhDs are probably the leanest degree for a research school to support.
In America the students at the undergraduate and masters levels pay to pursue their degrees, while the PhDs are paid by the school. As these students do not directly generate revenue, the PhD programs will be first on the chopping block and the admin who make the 'tough decisions' to keep the ship afloat will be off at their next jobs by the time the chickens come home to roost.
PhD students are typically only paid by the university if they provide labor in the form of being a teaching assistant for undergrads, guiding lab sessions and grading assignments and exams. Alternatively they're paid through their advisor's grants, in which case the student brings in revenue in the form of the large overhead cut the uni takes.
The alternative would be hiring dedicated employees to help with grading and lab sessions, and they won't tolerate the $30k/yr a PhD student does. This would have immediate impacts too, as there's no way a lone professor can keep up with grading for the class sizes in early undergrad.
They don't attend classes after ~2 years, mostly operate independently besides consulting with their advisor, don't take anywhere near a professor's salary, teach or TA classes, act as lab technicians, and bring in money through grants.
The costs are mostly upfront in the form of providing the necessary research facilities to attract research-oriented faculty and students, and the administrative staff needed to ensure compliance with grant terms.