Every serious economist does know that, but every serious economist cannot and will not argue that BIG (there's shouting for you

) mistakes were made over quite a number of years, these exploding upon us all in 2008 onwards. The economies of the world are still paying for them, they haven't gone away - otherwise City earnings would be able to be shown as being far better than they are. Just so it is clear for you and you only, they are doing okay
despite the huge ****-ups and dereliction of duty they exercised and the national and international funding that had to rescue them from their irresponsibility (I don't ignore the culpability of the national governments and the EU in this clusterfuck). The fact that you ignore or gloss over this still very real problem detracts still more from any claim you have as an expert.
Your memory is poor, because this comes from someone who has previously told you that he is someone with an informed Layman's knowledge and opinion. What a ****ing chump you are; your credibility is blown, your knowledge is biased, your reasoning also biased, yet you still bump your internet gums to tell us all what we should think.