You are so cynical:)
Imagine that "just out of the blue", L.A. passes an ordinance banning the washing of cars, unless it is done in an "approved" facility.
Of course, those approved facilities will all be union shops sending a fat payoff to those wonderful politicians.
If anyone thinks that banning the washing of cars is far-fetched, it has already been discussed and small airplanes have been prohibited from being washed for decades, due to "environmental concerns", of course.