Condemning a man to machine-like labor amounts to the same thing as slavery. If a factory worker must tire himself to death twelve hours and more, he is cut off from becoming man. Every labor is to have the intent that the man be satisfied. Therefore he must become a master in it too, be able to perform it as a totality. He who in a pin-factory only puts on the heads, only draws the wire, works, as it were, mechanically, like a machine; he remains half-trained, does not become a master: his labor cannot satisfy him, it can only fatigue him. His labor is nothing taken by itself, has no object in itself, is nothing complete in itself; he labors only into another’s hands and is used (exploited) by this other. For this laborer in another’s service there is no enjoyment of a cultivated mind, at most crude amusements: culture, you see, is barred against him.
Max Stirner, The Ego and Its Own, ed. David Leopold (Cambridge: 1995), p. 108