Is there a non-automatic light enforcement other than placing a policemen at every light - which makes the light useless?

Revenu generation is a bonus point: in my country taxes that incentive smokers to quit are directed to healthcare and most of the speeding tickets revenue goes to road maintenance and safety.

I’d prefer a public handling but the trend is privatization with everything : from health to education to water treatment. Even military assets! IMHO red light tickets enforcement is as much important.