Ludwig Von Mises said this quote

In the market economy the consumers are supreme. Consumers determine, by theirbuying or abstention from buying, what should be produced, by whom and how, ofwhat quality and in what quantity. The entrepreneurs, capitalists, and landowners whofail to satisfy in the best possible and cheapest way the most urgent of the not yetsatisfied wishes of the consumers are forced to go out of business and forfeit theirpreferred position. In business offices and in laboratories the keenest minds are busyfructifying the most complex achievements of scientific research for the production ofever better implements and gadgets for people who have no inkling of the scientifictheories that make the fabrication of such things possible. The bigger an enterprise is,the more it is forced to adjust its production activities to the changing whims andfancies of the masses, its masters. The fundamental principle of capitalism is massproduction to supply the masses. It is the patronage of the masses that makesenterprises grow into bigness. The common man is supreme in the market economy.He is the customer “who is always right.