Putting surveillance cameras in nursing homes would violate the privacy of the people living there.

One possible trade-off is to install security cameras instead of surveillance cameras. The difference is that a surveillance camera can be watched remotely, while a security camera makes only a local recording that is overwritten in a short time. The security camera would deter abuses while not lending itself to watching everyone.

I believe that only security cameras, not surveillance cameras, should be allowed pointing at places where the public is admitted, with exceptions allowed only under court orders for a specific place and time period.

As for nursing homes, they could install security cameras in the rooms of those patients that request them.