Phew, I am having a real hard time agreeing with you there. I mean, just imagine what would happen, if those social and tough jobs were not performed by people dedicated specifically to doing those jobs. Then we would all have to take care of our family's elderly and that can easily turn into a full time job itself. Let just one relative have Alzheimers or they for some reason cannot move any longer, or even less drastic conditions, that still require you to watch over them, and you will have all hands full taking care of them. This is the reason, why in many societies we decided to outsource this to people whose sole job it is to take care of other people.

Or take nurses for example. You really think they provide low value? Tell me more, when you are seeing a hospital from the inside at some point. Yet they are not paid much.

That's why I stated that the marginal job is what sets the reward. We actually have a lot more people wanting to do these jobs than we reasonably have a use for. Your mention of hospital nursing is actually a case in point: actual Registered Nurses are quite scarce, often do highly valuable, specialized work, and get paid a lot.