This is a very interesting point. So the people who experience the stratification the most are opposed to it. And those who are more in the middle they do not mind it.
That's really not the case at all. I suspect that a person's voting tendencies are largely a function of how they view work, personal finance, and the pernicious effects of taxation. Someone who can aptly be described as "idle rich" is far more likely to vote Democrat because these folks no longer see a direct correlation between work effort and personal income. The current generation of the Kennedy family is a good example of this. They -- like many other people who came into a lot of money without earning it -- espouse radical left-wing politics simply because they are bored to tears and look upon meddling in the lives of ordinary Americans as the only means of having any real purpose in life.
Not necessarily. Rich people who vote Democratic may do so for reasons other than the economic ones. For example, they may associate Republicans with religion and soi-disant "homophobia". They may want to be invited to parties, they may want gain approval of their neighbors, and so on. Finally, rich people are usually more intelligent, which in itself is not a bad thing, however, some intelligence is required to fall for abstract foolish ideologies.