Maximum self-sufficiency replaces specialization. The relevant unit for attaining self-sufficiency is not the atomized individual. It is the family, the neighborhood, the village. There is task differentiation, but nothing approaching what the market does. Specialists are a last resort.
Distribution operates on different principles too.
Price adjusts supply to demand automatically and continually. What is scarce and what generates money costs more than goods or services that are commonplace and not in short supply. Distribution within the non-market sector operates on different principles. Price is not the mechanism. Caring is not distributed based on ability to pay.