Over at TPM, in reply to prompting by the Sandwichman, Randall Wray wrote:
Work week reduction (or "work sharing") has never, anywhere, eliminated involuntary unemployment and underemployment; indeed, it has never had a significant effect. That reserve army of the unemployed persisted despite reduction to the 12 hour day, the 10 hour day, and the 8 hour day. It will persist even if we can move to the 6 hour day.
Meanwhile, Dean Baker wrote that one of two simple answers to the problem of secular stagnation was:
Work fewer hours - while workers in other wealthy countries can count on 4-6 weeks a year of vacation, workers in the United States are guaranteed no paid time off. As a result, the average work year in the United States involves almost 20 percent more hours than the work year in Western European countries. As fringe benefits a shorter work year can be more family friendly and also we can be less polluting if we take the benefits of our productivity growth in leisure instead of income.