Do you think it's possible that they stopped doing this because of austerity and budget tightening, and were then told (in effect) to outsource it 'to save money'? A bit like the PPI stuff?? Surely if it were just mismanagement, some councils would have kept it in house and shown the rest how it could be done. But this seems to be national norm from which there's no obvious escape now, and we're being held to ransom. Even if it was by national-scale blundering by councils, we still seem to be being held to ransom, given the reported profit margins (and they are, I'm sure, after every trick in the book to reduce the headline rate). Call me cynical if you like.
To be fair, 'trickle down economics' is the opposite of trickle-down economics.