When looking at systems of distribution one must ask the question as to how is value going to be determined within that system. Planned economies have value determined by bureaucrats normally with some input from citizens. Unions and monopolies through their own machinations fabricate value as well. In this way one might say that value is generated by explicit concerted effort. On the other hand, free markets make no attempt at determining value. Free markets leave value determination up to randomness which I think is one source of consternation for those who oppose free markets.
However, as an advocator of free markets I feel that it’s incumbent on me to give some rationale as to why value determination should be left to arbitrariness instead of being controlled. Typically I argue that value determination left to randomness prevents the consolidation of the power to determine value in the hands of just a few. Its preferable to have value randomly determined than planned when manipulating value leads to the consolidation of power and with it the ability to coerce.
Upon further reflection I think there might be a better explanation. As a consumer, healthy free markets maximize the amount of value one will give for an item without forcing them to pay for value they feel the item is not worth. This work in opposition as well, in the sense that the vendor will not sell an item for a value less then what they think it’s worth. In this way, free markets determine the most precise value for any item without coercing the either individual. Thus, the reason free market arbitrariness is preferable is because it maximizes precision value determination without coercion. Free markets enable one to determine value for them self.
While free markets may determine value capriciously such arbitrariness allows for the maximization of value without coercion. When a comparable planned economy is compared to a free market the free market will have significantly more value because things in a planned economy that would not be considered valuable can find value in the whimsical nature of the free market. This leads to an robust economy defined by an abundance of items that allow each individual to enrich their lives as they see fit. The free market arbitrariness generates much more wealth and accomplishes it without even forcing individuals to pay for value they don’t ascribe to an item.
I would take free markets for their lack of coercion. Its just a bonus that it generate more value then a comparable system were value determination is more constrained.