You still have the problem of misaligned incentives together with the fact that the only way to mitigate it is through coercion. This is why all communism inevitably leads to authoritarianism. The strength of capitalism is that it can absorb and indeed is designed to allow for the fact that humanity’s cooperative impulse --due to the fact that we evolved over hundreds of thousands of years to live in small bands of about 30 to 150 people-- cannot work at the level of the modern nation state.