I don’t know why you’re being downvoted - it’s the only thing that makes sense. If the fed doesn’t, then we’ll just see a huge boom in middlemen offering accounts that automatically spread across 250k chunks behind the scenes. They already exist as a niche product, but would become mainstream with more failures. Either way the fdic is insuring the same total amount of money, so may as well cut out that inefficiency and overhead of forcing everyone to have spreaders.