You're getting hung up on the idea of a "cabal" being some kind of formal thing that has explicit membership rules. But what we're talking about is simply the collusion of hyper-wealthy people in their various schemes. That's the cabal.
What you're defining as a "Cabal of Wealth" is an allowance by the people because they believe in the concept of joining it. If this isn't clear I'm happy to expand upon it.
That said, the crimes of "the cabal of wealth" are still on those responsible.