Labor produces marvels for the rich but it produces deprivation for the worker. It produces palaces, but hovels for the worker. It produces beauty, but deformity for the worker. It replaces labor by machines, but it throws one section of the workers back to barbaric labor, and it turns the remainder into machines.
"Economic and Philosophic Manuscripts". Book by Karl Marx, "Alienated Labor" (p. 135), 1983.