The symptoms you're describing don't seem to match the proposed treatment.
Police: "You've caught them red-handed on camera, but we're very busy and we don't care. Or perhaps this is a place where we're deliberately doing-nothing as a revenge or pressure-tactic against local politicians."
Shopkeeper: "Ah, but this time I have the camera-footage and fancy biometrics of everyone in the store!"
Police: "Oh, well why didn't you say so? That completely changes things, we're always willing to help out a fellow biometrics fan."
Depends on the judges. If police cannot prove the crime in front of the judge, they wasted their time. With proper evidence it's not a waste of time anymore.
You forgot the local DA that run on a political stance to NOT be tough on crime. Police will not arrest if the DA won't prosecute.