I used to work for Lehamn too, M&A. Now working on my own startup. I also found that the focus was on our incentives, and this is where the tech industry is different in that it sets the incentives aligned with the users.
Wall Street could do the same by changing its incentives, and grow massively together with their clients. Once they understand that clients all the way to the end ("crowd") investor can also be happy users.
One thing that bothered me about this article though, is that it just seemed like he had a personal reason to make his superiors look bad. After all, he built his entire career in Goldman, so why burn your bridges? Unless they are already burned and you are leaving with a blast anyway, and maybe you are trying to get back at someone.
I thought of that article too, I think we need more of everything - coders, programmers, it will fuel entrepreneurship if more people will have the tools to do more with what we already know.