When we stop consuming more and more. For the most part I could work a single day work week (at 1/5th of my comfy developer salary) and live a lifestyle better than Russell's, that easily covers all basic needs (including modern ones like internet access) with two exceptions.
The first is the sin taxes (cigarettes and alcohol), these are avoidable but the latter is the sort of thing that makes life worthwhile. These are easy enough for society to eliminate if we want to decrease work hours.
The second is housing costs, this is extremely complicated but suffice to say that we aren't at the optimum of what society can achieve, as evidenced by the fact that we've gone backwards in many ways.
If you minimize pointless consumption, live modestly and as a society eliminate those two problems then an 8 hour work week seems achievable.
0.3% of your 40 hour work week is a little over 7 minutes.
You are significantly overstating the importance of these taxes on your budget.
> Does that include things like heroic medical care for end-of-live issues, nursing care for the elderly, etc?
It seems like a good trade to sacrifice a few low quality years of our waning lives to get 4/5ths of our youthful high quality life back.
Closer to ~100 people. There are about 1 million farm workers who are U.S. citizens, and another 1-3 million undocumented workers. That's just direct farm labor. Related industries (distribution, restaurants, etc.) employ over 20 million people.
> We're off in an asymptote where we gets closer and closer to zero cost for basic needs, but the workweek never gets shorter.
Except we're nowhere close to that asymptote, especially outside the U.S. Countries like the U.K. use a formula called QALY to ration medical treatment. That's the direct byproduct of scarcity of labor (specifically trained medical labor).
Moreover, a society that starts working less is never going to develop the level of wealth and technology that will make things like replicators and space travel possible.
The number is higher if you account for all the foreigners eating US farm exports.