I'm curious what job you have. I'm a SWE who is in the process of moving into a manager role. As an IC, I am 100% certain that I could get the same amount of work done in a 24 hour work week. In fact, I was probably working less than that already and still meeting my deadlines and getting great reviews. As a manager for the same team, at the same company, I am now working a full 40 and there's no way I could cut 40% of my hours without a massive drop in output.
I'm not against a 4 day work week (in fact, my manager is talking about trying it out in Q4 for our department), but not everyone is an IC knowledge worker. There are plenty of roles where time does directly correlate with productivity, which is why this discussion is so complicated.
I agree, but that's kind of my point. There are plenty of people doing 40 hours worth of needed work right now. If we switch to a shorter work week, that work will need to be distributed to more people.
It's not an impossible problem to solve, but OPs comment seems to imply that there are no trade offs to be made if we switched to a 24 hour work week and I'm just trying to point out that that isn't the case.
I also do believe that this is somewhat intentional; to keep people too busy to think freely and effectively, so that a status quo is maintained.
I'm a SWE working on a small team.
I expect the following has at least in part occurred:
1. Your participation in "meetings" has increased significantly. Management tends to conveniently forget that interruptions have follow-on disruptions on focus. This is compounded by the Doorway Effect [0].
2. You don't trust your direct reports to handle the level of autonomy you had as an IC. You're being pushed by your management to provide status updates so you have to scurry around poking ICs.
3. You're still expected to have at least a portion of your IC output in addition to your management duties.
4. You've discovered the productivity of your team is a bell curve. Some can get work done quickly while others are much slower. This may be related to their skill/experience or their particular tasks.
5. You're pressured by management to split up work to deliver a baby in a month. This causes you to take on even more IC work to try to accede to such stupid expectations.
This worked out really well for me. I was satisfied with my work accomplishments, I had plenty of extra time to write books and spend more time with family and friends. I don't miss that 20% loss of income.