Under capitalism, value is extracted and concentrated. That in turn means that your employer is motivated to get as much value out of you as they can. Companies are motivated to charge you as much as they can convince you to pay.
Think about a friend who might ask to buy something of yours; let's say it's a sofa. If we apply that same logic of capitalism, you should try to get as much money as possible. I don't know about you, but I don't like the way that it feels.
As someone who dropped put of business school to fix cars for a living, I feel this.