University administrator: Graduate students incorrectly claim that teaching assistants should be considered university employees and thus entitled to the usual employee benefits.
Conclusion
TA's should not be considered university employees and thus be entitled to the usual employee benefits.
Evidence
Even though TA's teach classes (and get paid for it), the sole purpose of having them do stuff for the university is to give them money that will fund their education. If they could afford their education without the TA income or if they weren't pursuing their education, they wouldn't hold their teaching posts at all.
Evaluate
Given That TA's wouldn't have their jobs if they didn't need money to go to school where they teach, How Can We Still Argue That TA's should be considered university employees and thus be entitled to usual employee benefits?
Maybe there's a law that requires it. Maybe common decency argues in favor of it?
Does it really matter why the TA's have the job they have? If they're teaching like other teachers, shouldn't they be considered employees and receive benefits?
The administrator must be arguing,
So I guess we could even weaken by showing that the school is not on a tight budget.
Goal
Look for something that would help us argue that TA's should be considered university employees and thus be entitled to usual employee benefits.