Short Arm of the Law

Why do parking enforcement cars in St. Louis City have police-style revolving lights on their roofs?  Parking enforcement officers are supposed to write tickets and put them on cars that aren’t moving.  Does someone at City Hall think that a parked car getting a parking ticket is all of a sudden make like KITT and speed away, such that the parking enforcement officer will have to turn the roof lights on and give chase?  After all, the parking enforcement cars are all four-door Chevy Cobalts (maybe Aveos) — like the Chevy Citation of the 1980s, it is physically impossible to get a speeding citation if you drive the civilian version.