The hippie problem. South Park described it accurately.

Man 2: Right now we're proving we don't need corporations. We don't need money. This can become a commune where everyone just helps each other.

Man 1: Yeah, we'll have one guy who like, who like, makes bread. A-and one guy who like, l-looks out for other people's safety.

Stan: You mean like a baker and a cop?

Man 2: No no, can't you imagine a place where people live together and like, provide services for each other in exchange for their services?

Kyle: Yeah, it's called a town.