" There is this difference where a man works for himself, or where, when working for an employer, he takes his wages in kind, his wages depend upon the result of his labor. Should that, from any misadventure, prove futile, he gets nothing. When he works for an employer, however, he gets his wages anyhow—they depend upon the performance of the labor, not upon the result of the labor. "

― Henry George , Progress and Poverty