"The prolongation of the working-day beyond the limits of the natural day, into the night, only acts as a palliative. It quenches only in a slight degree the vampire thirst for the living blood of labour."

~ Marx, Karl. Capital, Vol. 1, Ch. 10, sec. 4.

"Who is the real criminal, Ladies and Gentlemen? Is it the starveling who occasionally steals a loaf of bread or burglarizes my house or is it he who is the eternal vampire on the body of labor, forever feeding on the bone and marrow of the worker, exploiting and oppressing him, always keeping him on the verge of starvation that he may exercise his benevolent charity upon him, and ultimately degrading him to the lowest depths."

Berkman, Alexander. Confession of a Convict.