Doesn't seem like a privileged argument. If the needs of a society can be met with 3-4 hours of work a day and automation for the rest, fighting to work only 8 hours a day does seem to miss the mark. Whether 3-4 hours of work a day is actually enough is a separate discussion worth having. There is good evidence supporting the idea that with more free time employees could get done in 30 hours a week what they are currently doing in 40. But he's been demonstrated to be absolutely right with regards to where the spoils of increased productivity go. It rarely if ever materializes as less work or better pay for the masses and always seem to be funneled to the moneyed class instead. I hardly think it's privileged to believe that the progress and advancements made in a society should benefit everyone instead of a handful of already extremely wealthy people.
https://cepr.org/voxeu/columns/teams-become-more-productive-...