I am talking about the basic field of economics and the basic premise that man seeks to maximize utility for themselves. Humans operated no differently from that under a feudalistic society. Your system depends on man doing something without gain to themselves. It rests on high levels of altruism and suffers from high levels of free rider problems. We have absolutely seen market sectors in various countries collapse due to things such as free rider problems (it is very well documented) and have seen humans refuse to invest in land that they do not have secure private ownership over. We are facing that problem with women farmers in Malawi for example and communal farming groups. They do not have individual ownership over the land and thus have little reason to make investments into it (since they won't be seeing the returns). This keeps them low productivity. This was also the same problem that we saw with feudalism, where serfs had no incentive to engage in labor outside of what was required by their lord.
Man has done this system before, and they do gain for themselves you moron, if we were all greedy and didn't care about others, we wouldn't have evolved and survive do. You don't know human nature, as you've only observed it under capitalism. Well, you refer to capitalists refusing, what about the working people? They'd all be benefiting, collective ownership and having a say in what gets done at the factory? Yes, yes, this appears under a capitalist system with the constant push for private production ownership, no surprise there. Uh, no, Serfs didn't engage because they thought feudalism was the only working system.