I agree that fairness will pose some short-run concerns. But, consider that it probably didn't make sense to early hunter-gatherers to work themselves to an ear

I agree that fairness will pose some short-run concerns. But, consider that it probably didn't make sense to early hunter-gatherers to work themselves to an early death in order to accumulate or bequeath hoards of any of the materials (raw or processed) or tools at their disposal. It seems certain they still had a sense of fairness, which suggests the triggers of that gut feeling are themselves quite malleable. One legacy of agricultural and industrial production has been the devaluing of just about all "non-productive" activity. A broad re-valuation of what we spend our time on might be a good place to start re-calibrating our sense of fairness.