A key reason for this is that we don't live a feudal society divided in serfs and lords by birthright, so most workers who do have the courage to stand up to ma

A key reason for this is that we don't live a feudal society divided in serfs and lords by birthright, so most workers who do have the courage to stand up to management can (and in most industries do) simply become managers. So the population of people in abusive jobs isn't representative of the whole society, it's a self-selected subpopulation of people who are willing to tolerate that.