Fengzi, granted, human motivation and behavior is skewed toward external rewards and reinforcement, more money, more recognition etc. I suspect that even the large scale communist experiments caved to the simplicity of getting people (some) to do something through such devices. Capitalism resorts to the incentives bag of tricks to get people to do more, do it better, faster, and cheaper, and then do all of it all over again by outsourcing everything to capitalist start-up countries.

For what it's worth, communism and capitalism share a common problem with regard to human behavior: Neither system has figured out how to get people to do something for the intrinsic good of doing it while being a good person doing it.