first dude: "hey i have way too many potatoes, here is some".
second dude: "i have too much milk, here is some."
In a small group or family, sure.
http://en.wikipedia.org/wiki/Dunbar%27s_numberDunbar's number is a suggested cognitive limit to the number of people with whom one can maintain stable social relationships. These are relationships in which an individual knows who each person is, and how each person relates to every other person.[1] Proponents assert that numbers larger than this generally require more restrictive rules, laws, and enforced norms to maintain a stable, cohesive group. It has been proposed to lie between 100 and 230, with a commonly used value of 150.
(...)
Dunbar's surveys of village and tribe sizes also appeared to approximate this predicted value, including 150 as the estimated size of a Neolithic farming village; 150 as the splitting point of Hutterite settlements (...)thats is not a limit, because we know about it, and are therefor able to work around it.
communism can scale.