@Radical_EgoCom The problem isn't exchanges *within* communes, but exchanges *between* communes. An individual commune *might* be able to function as a single household, but it would be pushing the size limit. Equality *might* exist within a "household," so long as it's an autarky or there is no division of labor. But when you have exchanges between "households" and division of labor, the exchanges will *resemble* a market, and economic inequalities *will* appear.
@Radical_EgoCom (Equality within an independent collective would be a lot easier if it has no division of labor *and* it's an autarky, but I think it *might* be possible with just one of those conditions.)