The market is irrational and inefficient. We can do better.
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To expand on this, markets are fine when it comes to "treats," but wholly inappropriate when it comes to the necessities of life like food, water, housing, healthcare, employment, environment, etc.
I'd argue that even with "treats" markets eventually become a burden. For example, something like streaming services, which have become socialized across most households in the West, would be significantly better "treats" if they were all centralized under a single universally available service.
True. I was also thinking along the lines of "what sort of product do people even want" and using a market logic to sort that out but the idea may well collapse when you take our capitalist conditions away.
China serms to focus on actual needs first, but then lets entrepreneurs address treats, until they get too greedy, or try to plot against the will of the proletariat.