The only chart you need to understand the legacy parties
Note that these are all-time figures. Note the direct correlation between funding and bankster money. And note that Ds and Rs are randomly distributed throughout the list.
So, don't think of two parties.
Think of the 1% as managing a portfolio of differently branded factions, rather like sports teams, or (more to the point) porn stars.
It is true that the 1% backs Obama because they feel he will service them best. But think of the election as a sort of casting couch, where the 1% gives the leaders of other factions the opportunity to demonstrate their skills and specialties; the ability to con the voters being one such skill, of course.
NOTE This is sloppy, but to lay down the marker: One should never assume that people have only one motive. One way to look at Clinton's faction vs. Obama's faction is that while each are corrupt, Clinton's faction is corrupt in an old-fashioned, "Tammany Hall," sort of way; nobody can listen to the Clintons for long without hearing them go off on policy wonkery. Under Boss Tweed, Manhattan actually did thrive! Obama, by contrast, is more post-modern: corruption purified of wonkery. With Obama, the elite decided to purify the notion of "public purpose" from the discourse once and for all. However, returning to Clintonism is not in the cards. That faction has had its day.
The chart is from this piece by Glenn Greenwald; I'm sharpening the point.