They may pull all the important strings, but only as far as it serves their own self-interest. They don't give a crap about abortion, or gay rights, or xenophobic policy, or Orwellian oversight. So those issues can mark a difference between the parties. Plus, you can expect the Democrats to at least put up a fight against the military-industrial complex, while the Republicans will just gladly hand them everything on a silver platter.
This is a fresh idea for me, so please cut me some slack in the retorts.
Another idea I'm tossing around is that the US is still acting as if the Cold War were still on. After WWII they went a little wild trying to build their economic (ergo military) might, and going around the world controlling everything they could in their own self-interest, to try and keep up with, and defeat, the USSR. It's been two decades now that the Cold War ended, but the whole political and industrial machine was entirely designed to build up a fighting force against Communism, and that stuff can't just be turned off like a tap. Russia is the same, still stuck in it's Cold War ways. But there is no real ideological war of conquest being fought any more. It seems to me any conflict now is, at it's root, of an economic nature.
So it's not entirely fair to blame the politicians, because they inherited the system as it is. Anything of this scale takes time to turn around. Hell, it took Detroit 4 decades to straighten out it's act after having the market to themselves for such a long time beforehand. So I believe positive change will come, eventually. It has to, really. This isn't a sustainable path as we can see for so many reasons.
But those who want to speed up the transition away from the military-industrial complex and belligerent foreign policy, need to vote Democrat.
Also, I just need to say the video in the OP is retarded, IMO.