From back when I worked at a university business school:
1. We had a tremendous problem keeping on statistics teachers because of exactly what you are talking about. And a problem watching for grade inflation, since some of our adjuncts quickly realized that our hiring was based on student evaluations so we could be competitive during the university budget process (which was an entirely different and irritating can of worms, but I digress.)
2. Some of the students in our doctoral program taught at a certain very well known and quite large for-profit institution - and reported that that particular institution would actually change grades based on student complaints, without consulting with the professor.
no subject
1. We had a tremendous problem keeping on statistics teachers because of exactly what you are talking about. And a problem watching for grade inflation, since some of our adjuncts quickly realized that our hiring was based on student evaluations so we could be competitive during the university budget process (which was an entirely different and irritating can of worms, but I digress.)
2. Some of the students in our doctoral program taught at a certain very well known and quite large for-profit institution - and reported that that particular institution would actually change grades based on student complaints, without consulting with the professor.