Freedom is a tricky concept. When, for example, a person has to do a job they hate for small wages, because all other positions in their small town are already taken and they need to eat something - is that person really free? Their circumstances can be exploited by others, which essentially is the same as if the government exploited them - the latter would be called totalitarianism though.
The more I think about it, the more I come to the conclusion that perfectly free market isn't all that free, since one of the types of freedom it grants is a freedom to exploit others' basic needs, which is essentially an oppression. Freedom of oppression isn't really a freedom, is it?
The way I see it, market regulations are essentially the same as law system. You could say that law system is oppressive, because it limits people's freedoms - but in reality it limits people's freedoms to violate others' freedoms. Same here: a system that pushes the companies to reward their workers better at the expense of the company's heads isn't oppressive, it is simply a regulation aimed at guaranteeing better overall quality of life and happier lives of people. Granted, there is a point at which businesses start not being viable any more, so some balance should be maintained. Is the current minimum wage in the US balanced? I doubt that.