>I see no contradiction or flaw. What I desire is a world where it is possible for any person to survive working 20 hours a week with a couple months off.

What GP is arguing is that is achieved by fixing the pay distribution, not by limiting hours. If you only limit hours but don't fix the pay problem you create perverse incentives where people have to work undocumented "overtime" or face the threat that they will be replaced by someone who will or where people who want to work overtime face punitive punishments if they do so.