With incentives, actual numbers matter. So yes, speed trap towns have bad incentives, but for national governments fines going to general revenue does not cause

With incentives, actual numbers matter. So yes, speed trap towns have bad incentives, but for national governments fines going to general revenue does not cause a problem even if in principle it is a bad incentive. In my country, local authorities are often accused of using parking fines as revenue, but the police are rarely accused of seizing for gain. As an unofficial punishment yes, but not for gain.