The difference is the fiat system has a controller who can change the rules whenever it's convenient. Bitcoin doesn't. The Fed can print 4 trillion overnight. Bitcoin miners can't add a 22nd million coin no matter how many nodes vote for it. Your fiat comparison proves my point. I'm not saying 'anything goes.' I'm saying the rules are set by math and anyone running a node can verify them. BIP-110 wants a committee to decide what counts as 'legitimate' block space. That's the Fed model, not the Bitcoin model.

Oh, so if consensus says there's a 22nd million coin it's not bitcoin? Being consensus valid is the only limiting principle to you. You ARE saying anything goes, that's been my point. If consensus valid is the only thing that matters nearly anything is permissable. Also, BIP 110 has no committee so, I'm not sure where you got that but changing consensus has been happening in Bitcoin for over a decade.