The contrast between a market economy and a state economy is not a clean contrast. The distinctions are on a continuum. The institutions, customs and laws are the carriers of process and provide bounds to process. They limit the dynamics. The role of macroeconomic policy is to bound the dynamics of an evolving society.
Individual behavior is local and necessarily myopic.
Myopic local optimization is consistent with global evolution. An elementary understanding of history and the decision and game theory proliferation of strategies is enough to indicate that the search for a unique or even stationary economic dynamics is an essay in futility. In contrast the search for the correct carriers and bounds on process is feasible. The monetary structure provides the sufficient loose coupling to permit mass independent behavior to take place even somewhat chaotically within institutional bounds. Furthermore the mathematical development of many of the points noted here is given there.