This is the ultimate first world problem. How were you being robbed? Someone holding a gun against your head stealing all your time? Or did you agree to a salary and are now so upset you could have been paid more. These companies make billions. They could afford to give everyone a raise. Why would they if you accept a lower salary? Why would a company try to pay you as much as possible for your work. Get over yourself.

Illegally colluding. The only reason they hire people is to make money. If they think paying more for employees will raise salaries all round and cause them to loose profit, they won't do it. It was cost benefit analysis.