Nathan, I'm not sure you understand the way markets work and why they work. It's not really something you can construct based on whatever arbitrary principle you personally like. Which is what jmfcst was saying - I got his analogy just fine.
The point I was trying to make was germane to regulation and to how we socially conceptualize markets, not to what a market's necessarily actually 'doing' at its core. I think we probably had different ideas of what jmfcst's point was supposed to be.
You seemed to be saying that we can decide what motives drive actors in the market, but that's pretty dubious. But it's possible that I misunderstood you.
He'll correct me if I'm putting the wrong words in his mouth, but I think what Nathan was getting at with that comment was that we should have some regulation to muzzle the market and try - to the extent that it's possible - to harness the maximum positive and reduce the negative effects of a free market system.
I mean, let's say taxes may reduce the incentive to earn, but that still doesn't make it okay for a modern country not to have tax-funded public healthcare, and so on.