"You can opt not to fund speed cameras by simply not speeding. If you can't do that then don't drive or at least don't drive anywhere near my kids."
Or, alternatively you could opt to teach your kids common sense when it comes to road traffic. You don't have to be hit by a car that is doing more than the speed limit to get killed by it. If you jump out from behind a car at the very last moment, the driver has almost nothing they can do, and may end up steering into oncoming traffic. If your kids are going to be causing road accidents like that, don't let them anywhere near my car.
I fully agree with the current speed limits in built up areas, but most of the talk here is about speeding on motorways where a lot of the time it is perfectly safe to drive over the speed limit. There used to be no speed limits on motorways. They weren't even put in place because of accidents - they were put in place because some idiot drove his 180mph racing car down it and the government got spooked at what *might* happen. Police drivers are still trained to drive well over the speed limit, so don't try to pretend that it is always automatically unsafe to drive over the limit if you have had proper training.
If only 12% of fatal accidents happen while over the speed limit, that tells you that speed is a pretty *small* factor in accidents. What percentage of people regularly break the speed limit? I'd suggest about 15% or more since Wikipedia states that speed limits are usually set by an 85th percentile rule. Greater speed does reduce reaction time, but accidents are always caused by driver error, like taking a corner too fast (too fast might still be under the speed limit) or observation. Going slower does observation easier. If you trained people to do more observation, they naturally drive slower around town. I know I did when I did my advanced driver training and test. But if you train people to think that being under the speed limit automatically makes everything okay, they can spend more time thinking about the speedometer than worrying about what is happening around them.
People like you need to stop with your whiny "think of the children" act. People do not mind 30mph speed limits in residential areas. This is more about B road and motorway driving. Your children should *not* be playing in these roads if you have done your job as a parent.