An economy is controlled by communication. And whereas the traditional meaning of money is something real, pesos or dollars (Euros, whatever) are strictly units of information. Those units of information traditionally enable people to cooperate without knowing each other, and without bartering apples for automobiles.I emphasize "tradition," but do not be deceived by that; the fact that you can understand what I have written is due simply to your (and my own) knowledge of the traditional meanings of words.
Price controls are mere censorship of of the language of cooperation, invidious and inimicable to free and voluntary cooperation.