I don’t know if you noticed, but everyone withdrawing at once is what caused the bank to collapse. Some of them got all their cash out, many of them got locked

I don’t know if you noticed, but everyone withdrawing at once is what caused the bank to collapse. Some of them got all their cash out, many of them got locked up and risked not have enough uninsured funds to continue doing business for another week. Agreeing not to withdraw all at once can get to an outcome where nobody has 100% of their funds accessible, but nobody is in that bad position. Since most participants would be happier with that than a risk of not making payroll, the goal was to agree on collective action to find the latter outcome. Lots of financial transaction competitions end up with optimal game-theoretic solutions because the participants are actually rational. Here, they failed, and are now whinging like little babies.