Questionable on both accounts. There are people who are saying this, and I am not sure that this is the best system that we (as in biological humans with our desires) could ever have. The experimentations so far (e.g. USSR) shows the opposite, that having more material incentive help humans to be more productive.
Nobody is saying that communism is human nature either, but that it is the best system we could ever have.
Questionable on both accounts. There are people who are saying this, and I am not sure that this is the best system that we (as in biological humans with our desires) could ever have. The experimentations so far (e.g. USSR) shows the opposite, that having more material incentive help humans to be more productive.