I see, and what I talked about in Germany and other countries, is this:
https://en.wikipedia.org/wiki/Deposit_insurance The principle base question in both models is the same: to what degree can such a guarantee finance financial collapse of other institutions, or the system. Obviously the reach is limited in case of a bank run. Safeties like this help if just one bank falls, or one investment company. If the whole system is at risk, than Sayonara. And that is a very real danger. FIAT money. Its brain cancer, bone cancer, blood cancer and pancreas cancer all in one.