@hakan_geijer
For some communities, it may well be a market mechanism. Others may choose a market, but with another countervailing check on the market behaviour. I don't think there's a one size fits all solution, but it *is* important that we understand the solutions that are available to us, and where their strengths and limitations lie.
I hope that doesn't seem like I'm dodging the question, because it's a totally valid one.