Yes, exactly. It identifies cars and drivers who are committing traffic violations, and issues citations.
I don't have the specific numbers you ask for, seeing as I can't even remember the country, but it's not difficult to imagine that if sufficiently many such cameras are installed that most moving violations on major roadways are caught and punished, then yes, people will come to (reasonably) believe that the cost of committing the violation is close to the price of the fine, rather than close to zero.
It's one thing to blow by a pedestrian crossing the street, it's another to do so knowing you'll probably be charged $150 (or whatever) for having done it.
If you read "one can see how someone might not object to this" and understand "this is a good thing to have" then I'm afraid the issue is you contributing the stats that news agencies like to publish about American reading comprehension trends.
In this case, incentives are for people who'd like to reduce traffic deaths.