I think you're missing the part where the government spends the same amount on defense regardless of the tax level. The question being batted back and forth between Democrats and Republicans is "raise taxes or print money?"
Still, I agree we need a movement which will kick-out rent-seeking entities out of the spending loop. I wasn't so much agreeing with Buffet as using him as an example.
Also, I have no desire for that Koch brothers to agree with me. I would like them to go to jail but the odds look long.