From Liberty and Property — surrounding passage

Under capitalism private property of the factors of production is a social function. The entrepreneurs, capitalists, and land owners are mandataries, as it were, of the consumers, and their mandate is revocable. In order to be rich, it is not sufficient to have once saved and accumulated capital. It is necessary to invest it again and again in those lines in which it best fills the wants of the consumers.

“The market process is a daily repeated plebiscite, and it ejects inevitably from the ranks of profitable people those who do not employ their property according to the orders given by the public.”

But business, the target of fanatical hatred on the part of all contemporary governments and self-styled intellectuals, acquires and preserves bigness only because it works for the masses. The plants that cater to the luxuries of the few never attain big size. The shortcoming of nineteenth-century historians and politicians was that they failed to realize that the workers were the main consumers of the products of industry.