Well, so this kind of thinking is really part of the problem. The number of hours you put into something should never matter. What matters is the value of the productivity. We should be getting paid on the marginal value of our labor, not the minimum we're willing to bear. In addition, if the job can get done in 15 hours, then we should get paid the same, regardless. It's the conflation of hours to productivity that's destructive in this conversation. They're not the same, and a reduction in the work week should not be a salary-reducing event.