Not only should people in most industries be working less, they should be paid more for it. Cutting my income by 20% for the privilege of working less is unacceptable. Especially when it's been proven that working less is an overall net positive for companies as well[4].
Stop being greedy, and treat your employees well.
[1]: https://en.wikipedia.org/wiki/Decoupling_of_wages_from_produ...
[2]: https://www.epi.org/publication/charting-wage-stagnation/
[3]: https://www.epi.org/productivity-pay-gap/
[4]: https://www.businessinsider.com/4-day-workweek-successful-tr...