@cee-dee wrote:

Because those who needed deterring would persist in that form of behaviour where they couldn't be seen and not found out.


I accept that there may possibly be a tiny number of individuals who have gone into the job with sadistic tendencies and would possibly seek opportunities to abuse residents purely for the pleasure derived from doing so.

 

The majority of cases that have come to light don't however fit into this category - rather it is a matter of negligence, (ignoring someone in need), lack of concern, anger, incompetence etc.  All instances of neglect that would either be deterred by overt cameras or recorded for action to be taken.