A plongeur is a slave, and a wasted slave, doing stupid and largely unnecessary work. He is kept at work, ultimately, because of a vague feeling that he would be dangerous if he had leisure. And educated people, who should be on his side, acquiesce in the process, because they know nothing about him and consequently are afraid of him.

The Complete Works of George Orwell: Down and out in Paris and London (ed. Harvill Secker, 1997)