Dont u get VISA position? If is separable who runs the servers secure the chain? VISA of course. And they'll charge 2 to 5 pct per txn for the service. TBH a blockchain backend would be a lot better than a sql db to store financial txns... so it is not all bad.
Financial transaction DBs aren't typically SQL and are more often
journaling DBs like the block chain already, but without PoW as they trust their systems.