Bad idea. A lot of people don't have time to race every single day or even every weekend. I managed to get in a lot of racing because of the winter break but now that I'm back to working 40 hour weeks plus full time school there's no way I'm going to be able to race more than a few hours per week. I shouldn't be stuck with a Copper license forever just because I'm time limited.
Now this is probably true. I'll use myself as evidence. I think that perhaps it would be better if licenses were based on race times instead of race wins. I think I'm probably fast enough to be playing with the Silver guys (and I have my Silver license) but I really can't see myself moving up much futher. I'm sure I'll eventually get my Gold license, given enough time, but I'm not sure that I'll have gotten it though fast driving or simply through persistance.
I'd rather see the licenses graduated based on overall speed (for full length races, not hotlaps). The WR setting guys would be the platinum group, WR+2% would be Gold, WR+5% would be silver, WR+10% would be Gold, WR+20% would be Bronze, and everything else would be copper. Now, these are just off the top of my head, but something like this would allow people to continually race against people of the same caliber. To get the next license up you would have to get faster, not just finish races. This would also allow people to race cars other than the road cars since you might hold a Silver license in the XRT/FXO/RB4 group, but a Bronze license in the GTR group. Of course, since the STCC doesn't use the GTR or open-wheel cars this extra benefit of such a system might not be of much use to them, but I think it would make for very compelling racing and an even playing field while still making use of tiered servers, new track/car combos, etc.