University graduates are not the same as professors.

The econ class I took at Caltech was taught by an award-winning leftist anti-capitalist professor, and if you didn't regurgitate his ideology on the tests, you got a bad grade.

Hedge funds only hire a particular subset of graduates. A lot of left-wingers set aside their ideology to get those high salaries.

My father was a finance professor at two colleges. He was the only faculty member who believed in free markets. He was constantly challenged in this by students and faculty. One time the faculty even challenged him to an open debate - the faculty against him. He took them apart. Faculty and students came up to him later saying they had no idea there was even a case for the free market, and thanked him for opening their eyes.

I wonder where you suppose Sanders' constituency comes from?