The police are as commercial an operation as McDonalds, StarBucks or any other money exchanging organisation.
Hence why a speeding ticket will be enforced until the money changes hand, whilst a burglary investigation (which involves the police distributing their own resources) will go the same way as any loss making proposition goes.......
If you don't believe it then follow this
http://coppersblog.*************/
Plod, as any other commercial enterprise, is just trying to make £££££££££ out of LOS. That's just what they do....