It's frustrating to see our few traffic cops issue warnings. Criminy, car crashes are a  major source of serious injury and death in this county, state, nation. Why do our cops refuse to treat it seriously?

Behavior studies and game theory all show that the best and only way to cause significant society-wide changes in behavior is to make the odds of being caught high enough to be perceived as a near certainty; the severity of the punishment is almost a non-issue, what counts is that there is some punishment. Embarrassment from a warning isn't really punishment since it feels like winning the lottery. 

We need for our cops to understand this and stop doing warnings. This cop says he could write citations all day. Fine, then he should do it. After a few months, he'd likely find that there are very few people still violating the laws he enforces. Hmm, maybe he's refusing to do his job in the interest of job security.