I fear that as well, but if there's enough pressure, the "always on tape" mentality might win out, and
good cops could get the recognition they deserve, as well as
significantly more evidence (and more accurate - witnesses are pretty bad) for many crimes. If nothing else, it's better than the alternative; when it's your word vs a cop, who's going to be trusted? Disallowing this would
encourage abusers.
Honestly, I see this as a publicly-run oversight committee. It should be hard to be a cop - a lot of power and respect goes with the title (typically). And if there are fewer abusers, that's likely to increase.