How bout a different Idea
Here's an idea I'll throw out to everyone as food for thought; how bout instead of "spec"ing out a specific tire for the class (as this has gone NOWHERE for how long now?) how bout putting a limit on how many sets of tires competitors are allowed to use throughout a season?
You can run whatever tire your heart desires, but say you are only allowed 2 or 3 sets. For those who want to spend the money on buying the most trick racing slick they can get their hands on...great, BUT can you manage those tires for 5 race weekends? You may be blazing fast those first two, but then you'll be pretty screwed throughout the rest of the season.
If you don't want/have the resources to buy 3 sets of slicks but can do 1 set of radials, you may not be as competitive at first, but strategically you will have less drop off in performance (heck maybe even gain from what I've heard about them) throughout the rest of the season.
No matter what, this will save everyone money whether they like it or not. As far as being able to manage a system like that, I'll let someone else figure that out. This is just another idea of looking at the issues that everyone keeps bringing up instead of this constant argument that has gone beyond ridiculous.