We know that if engineers, scientists, or doctors are paid ten or a hundred times more than a labourer, and if a weaver earns three times more than an agricultural labourer, and ten times more than a girl in a match factory, it is not by reason of their "cost of production," but by reason of a monopoly of education, or a monopoly of industry. Engineers, scientists, and doctors merely exploit their capital—their diplomas—as middle-class employers exploit a factory, or as nobles used to exploit their titles of nobility.
