@eh There's been plenty of research that shows that remote working increases productivity. It certainly did for me. Sitting in an office meant constant distractions.
What they're pi---d off about is the fact that you could sneak off for a couple of extra bathroom breaks without them knowing. Since they pay you, they feel that they own you. Obviously, as long as the work still gets done to a satisfactory level, this shouldn't be an issue. But when you've got a room full of incompetent executives in a meeting room discussing why the company they're paid to run isn't doing too swell, there's not really going to be anyone piping up to go "Maybe we're the problem? The guys getting paid millions of dollars yet still can't turn this ship around?" They'll simply let the sh-t roll down hill, like always. They're not the problem, the problem is WFH! Employees being paid too much! Benefits that are too good! We have too many workers! The ones who are left after we sacked a bunch of their colleagues aren't motivated enough! Then they'll pat each other on the back, get a nice bonus, and then it all starts over again once the next fiscal quarter rolls around.