The perception of lost productivity, whether true or false, would be the opposition. I’m sure with a lot of specific jobs, productivity is highly maximized even at 40 hours. And in customer service positions, you might still need coverage 16 hours a day 7 days a week. So ultimately if your whole team of 12 works 8 fewer hours a week each, they’ll need to hire 3 more people to cover the lost time. If nobody’s weekly pay amount changed, now suddenly your labor costs have risen 25%.