Unless it's some sort of complete post-scarcity, it has to be understandable in market terms. What happens if people try to free-ride on the whole "communist" system? If they get excluded from its benefits, that's equivalent to enforcing some bundle of property rights.
> it has to be understandable in market terms
I like economics and math too, but the whole discussion of markets is a terrible starting place for deriving results in ethics/psychology. If you insist though, notice that unions will happen unless some other organization is working to prevent them. What do you suppose this means? People are aligned with each other exactly because they've noticed their coworkers are not corporations or governments.
Although the two are entangled, politics is a more relevant framing than economics here. If people weren't broadly aligned on basic stuff, then autocrats, theocrats, kleptocrats and so on would simply not be interested in dismantling democracies. They make that effort because they must.
You're not even wrong, as they say... I'm tempted to add 'seeing like a state' to your reading list.
"Understandable in market terms" doesn't mean the thing is actually understood, and in fact may be dangerously misunderstood.
> Unless it's some sort of complete post-scarcity, it has to be understandable in market terms.
No, it does not, and that's Graeber's whole point.
"Markets" are not some sort of physical law of the universe.
A simple example of this is it's the norm in hunter gatherer societies to take care of people who never will make an equal contribution back in the transactional sense.
Because the social ties in those societies are not simply transactions.
If your model fails to accurately describe empirical reality, time to improve/expand the model.