I'm all for punishing dirty drivers but this sounds like taking it a bridge too far. You'll still have those situations where people have been wrongly given penalties (one of those situations being a car losing control in the middle of the track, you're unable avoid them in time, make contact and you're given the penalty if they go off which has happened to me on a number of occasions) or SR downs for situations out of their control (welcome to Monza last week).
Imagine a 1 million Gr.1 car taken away from you because of that. It doesn't seem like the right way to go about it, I think. Also, Race A would be completely exempt from your idea since it's a specially provided car.
It would not be a problem if people drove clean though ...
We all hit people by mistake; I did in my three bad races last night. I hit a very early braking Porsche at the entry to the second corner. He wasn't brake testing, just first lap nervousness I reckon. A green Porsche ... but I pulled over and let him through just after ... of course if he'd totalled it into sand and not recovered, then I could not have done that.
IMO
continually crasher drivers treat hitting people as a means to success. So, in order to get more clean racing, that means of success needs to be stamped on IMO.
I was thinking about a comment about a Japanese driver a few days ago, who I described as "Fast". Evidently that driver is back in the game. He starts close to the pole, and crashes those in front out. He's been re-set lots of times. A good Aussie driver here said that he was on the pole, and that guy behind him ... and he let the crasher through - so goodbye to a likely deserved win, and lots of leading lap stats. That should not be the way the game goes I thought. Essentially rewarding the crasher driver.
A "crasher to success" driver would have a correlation between hitting people and passing them. Over a weeks racing, the stats from the game would actually clearly reveal those that crash into people to pass them.
So I'd say, have a ratio of passing people to hitting people. I'd also say - forget the fault issue. A hit is a hit is a hit. The stats would reveal who does it a lot to gain places, over a week of racing.
Maintain the fines and the removal of cars from each race to a crasher. So at the end of the week, then if your overall ratio is OK, you'd get your cars back ... but if not, well, time to buy some more I guess. Eventually skilled crashers would have to adapt their technique and hence "crasher to success" drivers would be removed from the game ...
Sven Jurgens would likely get punished with this system, because he starts from the back and hence he passes lots of cars, so any hit would hurt his stats. However as the game got cleaner then the hits would fall too and the game would be better for everyone, including Sven. 
