The point I was trying to make was that essentially in the eyes of his rich social contemporaries, FDR was a class traitor who sold them out, and not someone acting in their interests, short or long term.

Of course, we can see how it played out - which is why that comment about taking generations to roll back many of FDR's reforms is there. The rich didn't suddenly develop a social conscience following WWII - they faced Stalin, and then their nightmare of 'Communism' - only after that threat seemed safely over could they get back to work doing the one thing the rich can always be counted on - increasing their wealth without concern for any human being but themselves.