A Weekend at Bernier's said:
In lieu of being able to capture the magic of Goodfellas, Scorsese seemed to default to the shock factor on this one.
I don't think the intention there is to shock, exactly. I think that if you're looking for a point to the movie I'd say that it's not a coincidence at all that the first movie that Scorsese, a filmmaker who seems as rooted and connected to New York as any filmmaker is to any city, chose to make after the financial collapse is a detailed litany of the kinds of people who perpetrate fraud in the financial markets and the rewards that are there for them if they do. It's certainly a frank depiction of those things but, I'd say, frankness is probably needed to drive the point home of the kinds of people they are and the reasons they do what they do and Scorsese has never been the kind of guy who shied away from depicting things as they are.
I think that's why the controversy that surrounded the movie as to whether or not it was glamorizing guys like Belfort was so telling. Personally, I thought that if someone left that movie thinking that Belfort and his gang were cool or awesome or whatever then that person is probably a sociopath. However the controversy arose because those people exist, they often have prominent roles within the financial industry and the public at large doesn't seem to learn anything from the consequences of their actions.
I think it's probably my favourite Scorsese movie since Goodfellas.