engineer is greater than that necessary to make a navvy? And has not Marx asserted that the same distinction is equally logical between two branches of manual labour? He could not conclude otherwise, having on his own account taken up Ricardo's theory of value, and upheld that goods are exchanged in proportion to the quantity of work socially necessary for their production.
But we know what to think of this. We know that if engineers, scientists, or doctors are paid ten or a hundred times more than a labourer, and that 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.
As to the employer who pays an engineer twenty times more than a labourer, it is simply due to personal interest; if the engineer can economize £4000 a year on the cost of production, the employer pays him £800. And if the employer has a foreman who saves £400 on the work by cleverly sweating workmen, he gladly gives him £80 or £120 a year. He parts with an extra £40 when he expects to gain £400 by it; and this is the essence of the Capitalist system.
