[lelio]

Short of executing a convicted drunk driver and or long term jail terms, there is not much that can be done.
I think repeat offenders that show they can't handle social drinking and then operating a car should have a breathalizer installed in their car. If they can't pass the test the car won't turn on.
Granted they could have someone else breath into it, but who in their right mind would volunteer to do this?

[Let's Roll]

I remember a news story in Texas where an abusive drunk made his young children breathe into the analyzer so he could start the car.