Beyond the scope of this topic, naturally, but my thoughts come from a different perspective, in that I hold that the 'value' of anything, anything at all, is dependent on the one resource we all have on this planet and is, to me, of equal value to all. That is Time; I would have it that all labour should be rewarded only as far as the time it takes. No man, or woman, is born any richer nor poorer than another, but all have a certain Capital : the Time they have to live. I hold that one hour of anyone's time is as valuable as any other, and that all labour, of any sort, should be 'monied' only in the time it takes. The hours spent in a diamond mine should give a value to any diamond found, the hours spent baking bread given the same hourly rate. An airline pilot, a store check-out girl, a surgeon... all at the same hourly rate. There are details, and nuances, to this philosophy (those with responsibility, those working part-time, those studying for years, and more...), and there are certainly some less welcome consequences, but, to me, it is, all things considered, far better than the current notion of profit and exploitation. It's not jealousy, nor envy, but a sense of injustice when I note that so many folk on the Planet have next to nothing, in perpetuity, and others have much more than they have earned, or even need.
As I said previously, I'm well aware that it's not a popular notion, but my idea of 'worth' is based on this sort of thinking. One should be paid, fairly, for the hours spent on one's endeavours, and no more, the same as everyone else on Earth.