Where does the fine money go? Building more red-light cameras?
Or in the case of a private company contracted to run the cameras, don't give a private company a contract to run the cameras. At least not a contract where they get paid in proportion to the fines collected.
No one should profit off bad behavior. No government program's funding should have to depend on people driving badly.
You're putting those public services and their sources of funding in conflict with each other.