When I’m at a workplace I assume I’m being monitored, for performance, safety and to identify any wrongdoing should it occur. CCTV is a part of that.
I’ve never seen that as anything other than part & parcel of work and the transaction that comes with it: I want paying for my work; they want the security of being able to check things are OK. If things go wrong, it’s an insurance policy of sorts. It’s been 30 years, so I don’t know any different, to be honest.
I don’t subscribe to the ‘I’ve got nothing to hide’ concept per se, but like having a dashcam, it can change some behaviour.
I can well imagine that there are some industries or workplaces where it would be verging on impossible to be implemented – like healthcare, due to privacy and sensitivity issues for patients. It could, however, remove a lot of malpractice if installed. Some high-profile cases would be resolved almost immediately.