They vote for their material interests in the same sense that a man walking at night with sunglasses picks the best path. He thinks it's obvious but he really needs to take the sunglasses off and maybe get a flashlight. He's walking a stupid path and will probably fall into a ditch.
Fox News is probably the sunglasses in this metaphor.
I comment. Reminds me of how I'd end up playing medic in tfc/tf2- someone has to do it.
I don't post original stuff often, though.