I support standardized course evaluations that are tied to a professor's pay and promotion.  Having graduated from Waterloo myself, I've had my fair share of profs who just don't care about teaching or is exceptionally disrespectful towards students.  Hence, I disagree with the suggestion that students are always "biased".  If for example, most of the students do poorly on a midterm, then there has to be something wrong with your teaching.  Administration can't be in every classroom, without evaluation, how would they know? Obviously some profs, especially the ones who don't like to teach, would prefer not to be hold accountable and I'm not surprised if they're the ones opposing here. Systematic biases like lower rating for women or minority profs shouldn't ignored of course, but course evaluation MUST carry weight.