Earlier quoted context omitted.
Please note that the post gives an extremely bad impression. First of all, pareto efficiency and nash equilibria exist both in capitalism and other economic systems. And the obvious alternative economic system : centrally planned economies, are very much nash equilibria (if they are stable at all). But the second impression he gives is also very wrong. By definition, everyone is a "selfish dickhead" both in Nash equi…
I don't agree that the free market ever produces a pareto-efficient solution. If all market participants act selfishly in an unconstrained market you get a nash equilibrium because there are two avoidable downsides which the fully free market will naturally produce: the tragedy of the commons, and the concentration of resources. The tragedy of the commons can only be avoided by changing the rules of the market throug…
You're assuming that the external force will somehow make the "right" rules, the ones that actually fix the problems with the market and force participants to find Pareto optimal outcomes. Experience suggests that this is not the case; what actually happens is that the external force that makes the rules gets co-opted by some of the market participants, and you end up with worse outcomes (i.e., further from being Pareto optimal) because the concentration of power in the external force (the government) makes it easier to corrupt. Look up "regulatory capture".
> The concentration of resources is typically avoided through wealth redistribution, another mechanism of mandatory altruism.
Again, you're assuming that whoever redistributes the wealth will do so in a way that gets closer to a Pareto optimal outcome. Experience suggests that this is not the case; what actually happens is that the rules for redistribution get co-opted by some of the market participants, so you end up with a worse distribution of wealth. When the economy tanked in 2008, wealth got redistributed, by the government, to the banks that had caused the collapse, not to the people who lost their homes and their retirement savings.