A very liberal piece, but it's nice to see this finally entering the mainstream discussion. Of course, we could go so much further than just a 4-day work week of 8 hour days:

by working 4 or 5 hours a day till the age of forty-five or fifty, man could easily produce all that is necessary to guarantee comfort to society.
— Kropotkin, The Conquest of Bread

Just imagine how much we could do with the remaining time. We could dedicate ourselves to higher learning, to the creation of art and literature, to the building of community and betterment of all.