The one thing we do not need is for our financial system to carry on as if nothing has happened. But that is what bankers seem to want.
The world has carefully unlearned the lesson of the great depression of the 1930’s and especially the separation of investment from retail banking as embodied in the Glass-Steagall Act in the US. From the 1980’s onwards, greater and greater de-regulation in all spheres of financial activities led to the permissive culture in which anything went. And in the financial crisis it nearly all went – down the drain.
With the US showing some leadership , and the UK being embarrassed into following, maybe there are some grounds for hope.