What I am still surprised at, here in the U.K is the leniency of sentences, if you kill anybody by any other means the law comes down on you pretty hard, but use a car and you get a slapped wrist.
Harsher sentences do work, look at the places around the World that use them ,for other offences than driving ones usually, but the incidences of the crimes that are targetted being commited are very low.
A message needs to be sent out that if you drive badly ,it could cost you your liberty for a very long time, that would reduce offences I am sure.
The other problem we have here is lack of policing, Traffic Cops are as rare as Rocking- horse S**t, and so you can drive around like a loony, as one Pioneer does locally, with impunity.