Is inequality actually the problem when it comes to carbon? Just as a thought exercise, if everyone on earth, or even within each county, received an equal share of GDP, I suspect emissions may increase. You’d replace the private jets with more of everything else. Inequality is a major issue for a host of other reasons though, absolutely.
Lawyers hate this one weird trick! That wouldn’t work because you’re not actually being more “strict”, you’re still in opposition to the federal law. Being more “strict” means you’re still in compliance with federal law, you just do extra stuff on top. Semantics can’t change that.