I'm confused by this. The large banks are (arguably) more efficient because of economies of scale, eg. less duplicated management, purchasing power. So it's probably not a good idea to limit the size of banks which is what this article seems to propose, because that'll make banking more expensive. But the flip side is: why don't we just let megabanks go bust? If they go bust, the government steps in, briefly national…
That's the solution I would have preferred in 2008, but the political system has shown it can't commit to that solution. You lose any support for that resolution plan from conservatives at "briefly nationalizes", because they're afraid any nationalization won't turn out to be brief at all. So nationalization is off the table, and we have to stumble through with bailouts.