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If, however, a government refrains from regulations and allows matters to take their course, essential commodities soon attain a level of price out of the reach of all but the rich, the worthlessness of the money becomes apparent, and the fraud upon the public can be concealed no longer.

John Maynard Keynes (1929). “The Economic Consequences of the Peace: The classic text on the Treaty of Versailles and post war Europe”, p.141, Harriman House Limited
If, however, a government refrains from regulations and allows matters to take their course, essential commodities soon attain a level of price out of the reach of all but the rich, the worthlessness of the money