Capitalists, Marx answered, must enjoy a privileged and powerful position as owners of the means of production and are therefore able to ruthlessly exploit workers. Although the capitalist pays workers the correct wage, somehow—Marx was terribly vague here—the capitalist makes workers work more hours than are needed to create the worker’s labor power. If the capitalist pays each worker five dollars per day, he can require workers to work, say, twelve hours per day—a not uncommon workday during Marx’s time. Hence, if one labor hour equals one dollar, workers produce twelve dollars’ worth of products for the capitalist but are paid only five. The bottom line: capitalists extract “surplus value” from the workers and enjoy monetary profits.
Although Marx tried to use the labor theory of value against capitalism by stretching it to its limits, he unintentionally demonstrated the weakness of the theory’s logic and underlying assumptions. Marx was correct when he claimed that classical economists failed to adequately explain capitalist profits. But Marx failed as well. By the late nineteenth century, the economics profession rejected the labor theory of value. Mainstream economists now believe that capitalists do not earn profits by exploiting workers (see profits). Instead, they believe, entrepreneurial capitalists earn profits by forgoing current consumption, by taking risks, and by organizing production.