As far as change or a 'reset' in the next 5 years, not a chance.
In 2008, I said D.C. wouldn't change until a few presidential elections passed and there were significant changes in party make up. As of today, I am even more pessimistic.
Party leadership on both sides are delusional. They assume that when voters reject the opposing party, that automatically translates to a mandate for their policies. There is still a long way to go before they realize the truth. It probably won't happen until the current leadership is gone, dead or defeated at the polls. That may take a while and there are no guarantees.
As for a 5 year timeframe, not likely. If Obama and the Dems win, it will pretty much be business as usual. The Dem leadership has been doing things the same way for years and that is unlikely to change.
If the GOP wins or makes gains, they will, as they did in 2010, take that as a mandate. They are just that stupid. There will be no change. There was some hope that the Tea Party would be change agents but they have disappointed. Of the freshman class, those who have not proven themselves incapable of adult leadership have been co-opted by Boehner and his crew. The young guns in the party leadership, Cantor, Ryan, et al, will merely lead the party into a darker place.
There will be no revolution. It will be a gradual transition as the current ideologues are phased out or die. The process has started with a number of big names being voted out. However, there is a long way to go.
With regard to where the reset has to start, Washington or Wall Street, I would say it has to start in Washington. Some will say that Wall Street and K Street control D.C. While that is true to a degree, you can only corrupt the corruptible. Diogenes was a cynic so I doubt in his search for an honest man he was spending much time around politicians. However, out of a country of 320 million we ought to be able to find some who are statesmen, willing to negotiate to get things done, and unlike the famous drinking bird are not continually dipping their beak. Unfortunately, it will probably be quite a while before we have enough of these in Congress to make a difference.
Once D.C. is cleaned up, we at least have a fighting chance at restraining Wall Street. It's unfortunate that Pelosi's promise to 'clean the swamp' was just talking point and political pap and twaddle.