Slightly off target: this is actually an example of law enforcement as a function of revenue.
If you ever need an example to demonstrate that security is a function of agenda, use this story about speed cameras. Cities that have installed speed cameras are discovering motorists are driving slower, which is decreasing revenues from fines. So they’re turning the cameras off.
Perhaps a better solution would be to raise the fines to the remaining speeders to make up for the lost revenue?
[From Speeding Tickets and Agenda]
As for the proposed solution, it depends on the problem you’re trying to solve. If you’re trying to pull in revenue, that dictates one approach. If you’re after safety, that suggests another.