A killing machine - how careless?

I find this case incredible. As far as I am concerned, it is not careless driving to be doing 55mph on the wrong side of the road whilst drunk. This in my view is dangerous driving. I fail to see why Morphey has not been charged with manslaughter for the five lives he was responsible for killing. Even if he gets the maximum sentence of ten years, that's only two years apiece for each life lost, then there is the reduction in sentence. He will probably only serve 3 years 4 months. He's a killing machine, just what we need in the Army. They will probably keep his job open for him when he is released.