I'd like to see your data on that. When covid hit and sent everyone home I was working in the Danish public sector and we saw an increase in productivity. People worked less hours, or at least, they were using their computers for less hours, but they delivered more.

It probably would've lead to reforms if it wasn't because the employee satisfaction didn't do equally well. As you might imagine, covid was hard on middle managers, but it also turned out that quite a lot of employees (public sector might be very different than tech) got very lonely while working from home every day.