Maxdrypower, far from belittling traffic police, I think if you read my post again I'm expressing sadness that there are reduced numbers of dedicated traffic officers - I think they do a fantastic job.
When I was in my early twenties, I used to ride fast 1000cc motorcycles and was once stopped by a traffic officer for speeding through urban streets. He didn't give me a ticket but he did give me a real ear-bashing. That bollocking stuck with me a lot more than a traffic-camera ticket would have done.
Addressing your other points - yes, fatal accidents are fully investigated, but there doesn't seem to be any channel for communicating the lessons to the public, who are by and large, not interested.