inefficiency makes people grouchy

In sum, according to these visions, water should return to the height from which it falls, motive power or force should not be wasted, machine theories should address mechanical practice, workers should do as they are told, struggle should yield better-adapted forms of life, people should control themselves, and inhumane practices should be inefficient.

Alexander, Jennifer Karns.  The Mantra of Efficiency: From Waterwheel to Social Control.  Baltimore: The Johns Hopkins University Press, 2008, p 164.