Computational complexity theorists hate this one simple trick! NP hard is a lie! You just have to assert that a given problem has been optimally computed. We all know that physics obeys the whims of politics. </s>
It's especially ironic because if markets actually worked the way the "free market" dogma supposes they do, central planning would also work.
Yes, the participants of those markets are various degrees of willingness. No, I do not agree that makes them efficient.