Many believe that production among wage earners can be increased simply by increasing the number of hours that person works. Such reasoning holds that a person is a machine that can be switched off and on indifferent to their requirements as living beings.
Such assumptions are wrong.
People are not machines. They need rest. Hardworking people who put in 60 hours a week or more generally decline in productivity as the hours increase. It can even reach a point where the extra hours are completely useless. It can be more productive to work less. (see video above)