FreeBaGeL
Footballguy
I honestly think this is sort of a pie in the sky kind of idea. Employees would love to have to work less, but they are not going to agree to the corresponding 20% pay cut. Employers are not going to give them a 20% raise and lose the corresponding production. So other than a few outliers, this will probably never be realistic .
Why? It's happened multiple times already in history.
With productivity per hour factored in modern companies are essentially getting 160 hour workweeks worth of productivity compared to the 40 hours companies were getting in 1940 when the workweek was reduced to 40.
Imagine if our grandparents and their grandparents were as weak to their company overlords as we are today. We'd all still be working six 10+ hour days a week at a minimum baseline and thinking that was a reasonable work/life balance.