Employment is just a business. You are paid market value- influenced by supply and demand- for your body for production. You are paid to make the company money, not as a personal favour. The employer’s objective is to have the lowest marginal cost- that is, the lowest cost per additional unit of production. Each additional unit of production is every little bit of money you make for your employer. Beginner economics specifies that profit is maximized until the marginal cost equals the marginal revenue (production, in this case).
So, your employer wants to pay you as little as possible to make the most money out of your body. Then it will squeeze as much work out of you as possible until you are no longer making the company any money for the extra work. If you aren’t paid enough, it’s because there’s a lineup of cocksuckers who also want your job, who would happily eat your wage.
If you hate your job or are wondering why you aren’t making enough, perhaps it’s time to move forward. And if no one wants to pay you enough or make the life you want, perhaps it’s time to look outside employment.