The focus should be on whether goals and projects are being completed not how much people have their asses in office chairs.
For a company like that, how hard is it really for someone inside the physical office to hide the fact that they're watching cat videos all day? What does the physical office space have anything to do with it? We basically carry around portable entertainment devices that can fit in our pocket.
On top of that, a lot of companies have sophisticated HR software that monitors employee activity, some that even takes periodic screenshots.
It’s hard for me to pin “abuse” on working from home.
Just how much was being done in the office pre-pandemic? Those businesses likely didn't actually know. well they sure looked busy, right?
The abuse aspect is also interesting. Friend of mine got verbally abused. On zoom video with audio. While it was recording. So that was an experience when HR got involved.
Overworking is another aspect. That is still being explored. Plenty of scope for that to blow up as well.