Lets hear what Obama knows about the economy. So far all I have heard is raise taxes.
I used to work for a woman who had been in a PhD program in economics, and just decided to stop. She's unquestionably brilliant, but she has too much of a scientist's mind, and the pretend science that sometimes masquerades as economics - well, she just thought too much of it wasn't really science at all. Science is hypothesis, experimentation, theory and cause and effect. You do this, you get this result. If the hypothesis doesn't pan out, you modify or dump it.
If anything, economics is complex and predicated on many very non-scientific things, and if people really understood it, nation's economies wouldn't be run on so much damned guesswork.
If McCain doesn't get economics, he has lots of company, including people for whom it is their bread and butter.