From a business standpoint I think the movie missed a lot of important details...I do agree with your sentiment that Oliver Stone may not understand the future of the fund industry. However, he did touch on an issue which is of great importance going forward. Greed is eternal, it lives forever inside of all humans. In particular, greed temps those in positions of power to use her as a means for personal advancement. Let us reminisce for a moment:
"The point is, ladies and gentleman, that greed, for lack of a better word, is good. Greed is right, greed works. Greed clarifies, cuts through, and captures the essence of the evolutionary spirit. Greed, in all of its forms; greed for life, for money, for love, knowledge has marked the upward surge of mankind. And greed, you mark my words, will not only save Teldar Paper, but that other malfunctioning corporation called the USA. Thank you very much" (Gekko,WS).
This was the message Stone wanted to hammer home. No matter what type of regulation, rules, and social developments that may occur in the future, there will always be those who seek to manipulate the game for their favor. Goldman Sachs may die, but there will be another firm their to take its place.
Though, I am extremely disappointed that Stone jumped in Bed with Anthony Scaramucci to make this film. SKyBridge Capital was given a plug throughout the movie. This is not right and contradicts/compromises Stone's larger message of morals and ethics...