Pre-meditation has a specific legal meaning that really doesn't apply to typical drunk driving. Something more along the lines of what you're talking about is the Felony murder rule:

http://en.wikipedia.org/wiki/Felony_murder_rule

Unfortunately drunk driving is a misdemeanor and doesn't qualify.

Just to clarify, by nonsense I'm referring specifically to the idea of arbitrarily applying legal terms to situations where they aren't valid for punitive purposes. I disagree with harsher punishment as a crime deterrent, but I don't think harsher punishment itself is 'nonsense'.