Again, it comes back to prices. Where do they come from? What information do prices contain?
If a small diner, for example, in a small town advertises a job for $7.25, why is there this assumption that it could be $15 of only the owner weren't so greedy? It more likely that the job pays 7.25 because that's all that can be paid for that job, and if it's forced to $15, something has got to give. The owner can't lose money, or else the diner eases to exist. So, prices will rise, or the position will be eliminated entirely. If prices must rise to a point where the revenue drops (the coffee is now too expensive), it collapses. But, I guess that small diner wasn't "good enough" to exist?