Everyone votes in their own self interest... or at least they THINK they do.
You have people in the middle of kentucky on welfare voting republican who would cut them off, but really, they THINK they are voting for their own interests... Who doesn't vote that way?
As far as voting goes, my self interest is preserving the country our founding fathers built.
I have very different self interests than the democratic voters that (have cell phones and new
tennis shoes Jordans but) can't make it down to the DMV for an ID.