Trickle down economy?
As in that odd sensation as a stream of cold, hard cash runs down your trouser leg from a hole in your pocket.
As for funding criminality, people seem to be missing that users need cash to buy drugs, or time with a hooker. Which then means an economist could calculate relative values, ie cost of parking vs other activities.. and possibly expand on the social cost. So a hooker @ £4/hr may result in additional costs to the NHS.
Meanwhile, Kensington's residents may object to a cashless audit trail. Rather awkward if statements show parking charges from a quick visit to one's mistress, or master. And high class divorces can be soo expensive. For councils though, I guess it'd be a lot cheaper if meters were just replaced with numbered bays, and an app to rent bays (bays! Bays I said!) and allow the meter maids to check licence plates against rentals.