The capitalist is very fond of declaring that labour is a commodity, and the wage contract a bargain of purchase and sale like any other. But he instinctively expects his wage-earners to render him, not only obedience, but also personal deference. If the wage contract is a bargain of purchase and sale like any other, why is the workman expected to toff his hat to his employer, and to say 'sir' to him without reciprocity?

Industrial Democracy, written with Beatrice Webb (1902) 842