No one is forcing you to care or to produce any particular level of work. If your job has no growth opportunities and stagnant compensation then you might want to look for other opportunities.

I think the issue here is that you're trying to frame the issue in terms of some sort of concept of fairness. But in reality that has nothing to do with it.

That’s a bit misleading, no? If you don’t produce a certain level of work you’re going to be fired.