It is not that easy to develop a national-scale market economy. One central requirement is that buyers and sellers need to be able to trust each other's honesty, and to have effective methods of punishing dishonest behavior
On the village scale, interactions work because everybody has known everybody else for generations, and understands that they will have to interact with each other for generations into the future
On the national level, when a farmer buys tainted livestock feed from a company owned by the son of some Party member, he does not have effective recourse if the owners are immune from being punished for cheating a farmer.
The market economy is only viable in moral cultures
I agree.