I've heard of this happening in other countries, great in theory, but it is open for rorting if the correct background work is not done.
For example, you are a wealthy person with a family. Your kid goes to uni. You park longer or get caught speeding (via camera, not pulled over) instead of paying the new "high income earner" fine, you claim your kid (Poor uni student) had borrowed the car for the weekend. Now you are only subject to a fine that's half the price or whatever.
So I'm not sure how they are going to police this new rule. I think it can only work if you actually get pulled over while you are In the car at the time of the offense?
Back on topic, I have to agree with SILVABULLIT. I used to home deliver chinese food as a previous job to get pass uni and so many times when it has been raining, I have seen plenty of P Platers smashing into Telegraph posts or roundabouts. In 3 hours on a Friday nite once, I remember driving past 4 accidents, all involving P Platers and usually in some Commodore/Falcon or fairly well powered car (all standing outside their car thinking, "dad's gonna kill me").
Please do not get me wrong, not all P Platers are idiots, the majority are not. But it's those idiots that give all P Platers a bad name. I just think that until P Platers learn how to drive and drive well, especially in the wet, they shouldn't be allowed behind the wheels of such powerful cars.