Societies which aren't/weren't heavily monetized (and did most of their transactions in kind) tended to not really understand most of the basic theories of modern economics. Merchants (like you just described) actually tended to be held in very low esteem precisely because they were applying the foundations of ideas like supply and demand - ideas that weren't well understood, and thus it just seemed like merchants were preying on you and providing nothing of value in return. tl;dr you can't just undo monetization but keep everything else intact.