The banking system is not the enemy.
Banks play a critical role in our society. Whether big or small, they essentially do the same thing-- financial inter-mediation. That is, they bring together those people who have savings with those people who can put those savings to use doing some activity.
Almost every company that employs any person in the private sector today gets funding from a bank and has from their inception. Too many people talk too flippantly about "bringing down the international financial system". The consequences of this would be very bad. And it would not be the 1% who are hurt the most by this. It would be the 99%. Because the 99% are the most vulnerable to any downturn in the economy.