It's brutal.
Here’s a question for you: What are the benefits of being watched all the time?
I understand that from the employee’s perspective they might not like being watched all the time and that it can affect their behavior. It can also prevent them from doing their best work.
That said, there are reasons why an employer would want to watch their employees all the time. If the employee dislikes it enough and thinks they have better options, they can stop working there.
The only reasons an employer has to constantly be watching relate to paranoia or micromanagement, i.e. a lack of trust in the professionalism and competence of their employees. This is abysmal and the employee quitting or not is unrelated, much as how bullying is bad even if technically an employee can quit. Not to mention that quitting is not an optional for everyone, depending on their circumstances.