I don’t see “Breaking Bad” creator Vince Gilligan as any sort of moral prognosticator. He is a talented and occasionally traditional fantasist who understands that, at the end of the day, the most significant part of the word “antihero” is still “hero.” Gilligan coyly lets us know how shit’s going to go down in the very first scene of the finale: The cops cruise by; Walt escapes capture. Then, as our lovable dirtbag looks to the heavens, the keys to the car he’s attempting to steal fall right into his hands. God, i.e. the writer/director, is on his side. Walter White is going to win. And he’s going to win quite possibly for no better reason than that this has always been his story. (Remember last week’s episode, when Walt happens to be sitting in the bar in the middle of nowhere just as the Schwartzes appear on television? If that ain’t the Hand of Gilligan bestowing blessings, I don’t know what is.)
Then there's the wonderful meeting with Skyler in which Walt admits (finally?) that he didn't do it for his family. He did it for himself. He did it because he liked it. He did it because he was good at it and because it made him feel 'alive'. And my read is that Gilligan is ok with that, that Walt is a winner in the end because he lived life on his own terms--finally. He accomplished everything that he set out to do. Losing his family was collateral damage, but he was going to lose it anyway to cancer. The money is the only thing that mattered, it's his legacy, and he lives on in it.
And so Gilligan clearly wants us to believe that Walt isn't a monster, but a hero, a tragic American hero. I'm sure the Wall Street masters of the universe think about themselves in the same way.