I do think there was something in the Labour discussion about 4 day working weeks. I've urged my wife to apply for Friday's off, but although she'd like to she's a bit embarrassed about asking. Yet she's 55, the income is useful, but there is a quality of life balance to be had, and she could still work the 8-10 Friday's a year when they have busy periods.
The flaw was that it was for no loss of money.
We should probably encourage employers where they can to offer shorter working weeks to those that want it. Some will want more. I knew a guy who wasn't happy if he didn't get 60 hours a week, every week.