I think banking in your "modern society" has proved to be dangerous and wealth destroying... oh has 2008 not proved there is indeed a problem currently with global finance? Toxic derivatives.. mortgage backed securities?
Yet you are probably naive enough to think money printing can fix a structural problem. Have you not seen how the middle class is disintegrating and there is no real market now thanks to manipulation from these very banks. Bankers bonuses on the contrary have never been bigger
Banks are surviving on nothing but manipulated low interest rates and inflation at the cost of many hard working citizens.
The banking system needs to be broken down and simplified, that will only happen with the next banking crisis and this time there is not much central banks can do... which honestly is not too far away. Currently it is way too unstable, complexity has increased systematic risk and has allowed fraud/manipulation to become the norm. But bankers love false Keynesian based linear models as it allows them to mislead and over-leverage under the nose of regulators and bag themselves a neat bonus
Sorry I am not used to discussing finance on TSR, I suggest you do your homework really. I think anyone with half a brain who has been keeping up with current turmoil, CB policy and global finance in general could figure out this will not end well.
Stress tests, enormous amounts of off balance sheet derivatives, aggressive CB policy yet no economic growth in real terms, bail-in policies being put forward by EU etc etc etc... there is no specific source or 'evidence'.
You just keep up and then go figure.