I think any honest examination of the question is going to conclude that employers and their employees often have opposing interests and the lack of collective bargaining makes it much easier for employers to have their way in a relationship that is wildly imbalanced in the first place (I mean, really, compare the stakes of one worker's job for the employee and employer). We are in a profession where we are far more insulated from the ill effects of this than others; I think a lot of people posting here forget that.