Historically you have had at least some expectation of privacy. Because cameras didn't exist or weren't economical. You weren't being watched 24/7. So that type

Historically you have had at least some expectation of privacy. Because cameras didn't exist or weren't economical. You weren't being watched 24/7. So that type of thing can work and be effective for a business. The extreme granularity of visibility and control employers have is a very new phenomenon. No doubt they benefit from it, but whether it's mutually beneficial is up for debate.