Thanks to a student for pointing out this story on Cuban "agros," the capitalist farmers markets. When you allow people profit, they produce more. Since the produce is unavailable elsewhere, prices rise. When prices go up, the government comes in to announce price controls. Then when there are price controls, then sellers get angry and stop bothering (or just resort to the black market). That can make shoppers unhappy as well.
So when the Communist Party served notice that it plans to impose price controls at those agros — ending one of Cuba's few capitalist experiments — angry shoppers fearing yet more shortages turned on state inspectors in an unprecedented public rage.
Police were called to one farmers market this month when customers shouted and chanted at state workers conducting a routine inspection. Two Associated Press reporters were escorted out of the same market Tuesday after their questions about the changes caused another shouting match.