Re: This should be one of the easiest taxes to collect ...
Yes, you're completely correct, but it's immaterial whether you're stoned/pissed out of your box or sober.. If you can't see a cyclist or pedestrian because they're wearing black on a bike in pitch black on a single track country road in the middle of nowhere, with a speed differential of up to 50mph they deserve everything they get, it's common bloody sense. I built my autocycle on the basis that it was economical transport, environmentally friendly and could travel (with a tuned pipe at 35-37mph on the flat and just under 30 uphill) at a reasonable speed compared to traffic - I upgraded brakes and lights to the absolute best I could get... Result I'm not dead (notwithstanding the attempts of local Audi drivers).
Ditto the idiots who just wander out in the road as if the 2 tonne BMW SUV driven by a pint sized lass who can barely see over the dashboard doesn't exist.
Then you have the mindless idiot who was towing her two kids down the middle of a busy road in rush hour in the middle of a snowstorm (more like rush slither) and had "done nothing wrong".
It's scientific fact by the way that you are more likely to case a major crash from tiredness than you are from being ratted, simply because in a lot of cases drivers don't realise they are losing concentration until they've buried their landrover in the front of a class 66. Even the traffic reichpiglets admit this, but since you can't test for tiredness, at least not in any quantifiable way, it's easier to put the boot into drug & drink drivers.. Ably supported by "grieving mothers" who conveniently forget to mention the bit where little-miss-whole-life-in-front-of-her had the attention span of a goldfish, the spacial awareness of a narcoleptic sloth, and may or may not have been out of her gourd as well. It's collectively better for the human race that they're removed from the gene pool anyway.
Why do you think tachographs and monitoring systems were installed in trucks and coaches - it wasn't for fun, it was because tired drivers are the most dangerous, so they were made mandatory in those vehicles to combat tiredness. I'd like to see tachographs put in all cars, and the UK made entirely free of booze for a year - I'll bet money the highest reduction will be from tachographs, not lack of alcohol.