What I would like to see is serious incentives for police officers to turn in their colleagues and give IAB unlimited power to spy on every aspect of officers' lives.
There are good game-theoretic reasons why that is just a band-aid solution, compared to empowering citizens to apply some form of pressure to officers.
I think this goes a little too far. I would settle for cops being held to the same rules as everyone else for starters. If that's not enough, then sure, special inquisition powers for IAB and maybe also a citizen led review board.