The more respectable economists very clearly made the point that selfishness or selflessness is not an option that effects optimal resource allocation; assuming current limits based off animal biology. Centrally directed humans could decide to be selfless, and fail to output enough harvest for society because farmers' supply chain collapsed. Such collapse is inevitable when participating agents aren't permitted to act on localized knowledge to decide actions. Communism is not just morally incompatible with primate psychology, it is mathematically impossible (without a Mother Brain provided with sufficient information and communication capacity).