[benj111]

What about in addition to license suspension?

The suspension as punishment, the breathalyser as prevention of future incidents.

Yes that doesn't address the 'depending on your license' angle. but I'm not sure that should be a valid defence anyway?

[mantas]

Shall we demand hackers to never touch network-connected computer as prevention of future incidents?

I don't think life-long sentences is OK for all but most severe crimes. And a single DUI, especially on lower end of punishable spectrum, is not such.