I can see the logic of that, "Let's act irrationally together and force the government to bail us out next time we make a run on our own bank." Or they can act rationally, distribute (manually or through existing methods) their cash across multiple banks so that their risk exposure is lower and they don't have to depend on the government maybe, possibly, bailing them out. You know, the thing they'd have done if they'd hired financial managers in the first place (which obviously they didn't, or they hired incompetent ones).