To be fair, re: the "it's easier to hack a,n electronic thing than to fake a real key"...There still hasn't been a successful, orking copy made of the Belgian identity card, using a chip, unless actually using someone else's chip (so, destroying one ID to make another - it's still useful, but not for this purpose).
And believe me, people *have* been trying - a Belgian ID counts as a passport for most of the EU and quite a few other countries, as a green card in all of the EU, and gives access to (emergency) health care. So, you know, it might be crackable, sure, but it's damn hard, too. And if you're dealing with those, well, they'll just rig their car.
Personally, I'm all in favour of a mandatory breathalizer and license check. Than again, I'm Flemish; we tend to be more willing to go a lot further into Big Brother land than most, for our security.