As we have explained in the previous thread, miners are not entities that can be regulated on a protocol level. There is no reason why you should partition them into groups; they are solely the ones finding blocks with sufficient PoW and building the blockchain. Schemes like that would overhaul the entire Bitcoin and it would be better for anything like that to be implemented on an altcoin instead, though I don't really understand how that would differ from a traditional bank.

You could try to understand how Bitcoin actually works first before suggesting ideas. It would be far easier and more conducive for discussions that way.