http://neweconomics.org/publications/21-hours
Interesting idea. Back in the day they said we would have so much free time we wouldn't know what to do with it. What happened?
"The economist John Maynard Keynes imagined a 15-hour week by the beginning of the 21st century, because he thought we'd no longer have to work long hours to meet our material needs. But our ideas about what we "need" have greatly expanded. And the working week has got longer, not shorter."

