If an institution is too big to fail, then Politics was involved in getting it there, and politics will be involved in keeping it there.
As a Libertarian, I'm okay with failure, for the sole reason that failure is what fuels innovation.
That being said, Bernie is an interesting cat. He is a true socialist, who believes government has the ability to manage and shape the economy without unintended consequences. My experience is that most of the economic problems are due to (caused by) government interference, and not allowing the natural forces to work themselves out. Sometimes the lions eat the gazelles, sometimes the bugs eat the lions.
Can you mention one country outperforming the crisis that does not have way more and stronger goverment institutions then the
The liberatrian "small state" is as far as i have been able to tell religious in nature, with all empirical data contradicting the theory.
Shock therapy in eastern Europe is a good example of what happens if you simply dismantle a even a horribly inefficient government, and something similar have happened everything the small state "libertarian" theory have been tried in practice, things gets worse not better.
Libertarianism is based on assumptions that cannot be true for any system we can create from the ruins of the one we have.
The social democratic movement of Western Europe(Germany and Scandinavia in particular) Bernie Saunders is trying to introduce to America, is on the other hand very real, and most of it's polices have been tried out in practise and while they fall short of the full promise, they produced results rarely seen in other systems.
I am not saying his way are the right one but that the libertarian trap of ignoring the mess we have to start from should be avoided.