Measuring the value of work is a hard problem and it's politically loaded, so I don't really have a good answer to the "how" question. In my biased opinion, it

Measuring the value of work is a hard problem and it's politically loaded, so I don't really have a good answer to the "how" question. In my biased opinion, it is morally necessary to reward people for how hard they work at least partially when I consider what most work (jobs) consist of, which is economically disenfranchising hard manual labor. If I am younger and/or healthier and/or genetically stronger I'll be able to have higher throughput at those jobs, creating more value. However, I'm not sure that it's moral for people who are older, sicker, or not as genetically gifted to be rewarded less than me for doing essentially the same job. I'm not talking exclusively about monetary renumeration, just general "rewards". I'm sure not everyone buys into this, but it's what I meant with my earlier comment.