The system, as it exists does not allow change. I don't see Obama being the nominee because he promotes change. No, he is under attack because he speaks the truth about the state of affairs, thus he will not be nominated.

No, it will take a revolution after the fall of the empire for things to change. There will be a lot of hard times before then.

The bitter electorate will have to be impacted where it hurts most before change occurs. Will the change be good? I doubt that anything driven by anger and frustration will be good.