Here's a thought:

Separate FS into ProFS & FS.
Pro gets to run more tire, maybe race gas instead of pump for the regular FS, basically kind of optimize the FS car like way back in the SS days of the 60s-70s.
Maybe the money then gravitates to ProFS instead of screwing up FS.
But it may be too late. It's kind of a vicious spiral, the whole performance/parts/money/factory-involvment thing; eventually the regular guy gets pushed out unless the rules are very strict.