Spy Cars should be banned, speed cameras are there as a deterrent, the whole issue was raised a few years ago that they could not be a deterrent if they were coloured to blend in with the background and were out of sight (often sited behind road signs) - which is why they are now yellow and always in view. 'Spy Cars' go against this ruling.
I guess my read on this is more like...
Freeze parking fines (which are already ridiculously overpriced) but increase speeding fines which are clearly more serious an offence to over the £130 maximum you get for parking.
I find it hilarious that they fine 'to allow residents to park where they live' as plenty of people who live in our area have to park on yellows as there is insufficient parking spaces. The road and buildings are hundreds of years old and were never designed for cars, having wardens come round at 6am to slap tickets on cars parking overnight on yellows of people that live there and have parking permits is really harsh.
What also annoyed me was when I lived in Putney near the river, I would pay a lot for a parking permit to park on the road, but every weekend half my street would then be sectioned off by the council to allow trailers full of boats to be parked there, which no doubt they charged them for also - in effect doubling their money. I would often have to park about 3 or 4 streets away. I once got a ticket for parking outside my parking zone because of the trailers taking up over 20 parking spaces on the street.
In any case I would not expect motorists to benefit in any way whatsoever.