Re: MPs are not Knowledgeable enough to ask these questions
Don't forget the casino bolted onto the side.
In Barclays case the bank is "the casino", with a retail function bolted onto the side. Like most other large banks, it has an investment bank where the real money is made, a corporate function, where a little money is made, and a retail bank that makes very little and was historically used to finance the first two, but post ringfencing is even less important that it used to be.
Obviously, its not a casino, it only looks that way to those that don't understand international finance or investment, but there ya have it.