I like Stephen Hawking's essay or opinion piece the best. He identifies himself as a "elitist " and goes on to clarify why he and other people are elitist. He gives his opinion of not only why Trump won but why the EU vote in Britain turned out the way it did.  Money is not what makes an elitist. 
In my opinion, they make themselves that.  You can be penniless and still be an elitist. To me, an elitist is someone who feels intellectually superior to the masses. They feel that they know what is "best" for the masses, therefore are able to justify their actions or lack of actions when they go above the law. They like dealing behind closed doors because the "masses" are not smart enough or "educated" enough to understand. They ignore the masses and are totally indifferent to what the masses want, need, or believe in. Similar to Queen Of France saying " let them eat cake" when the people complained about not having enough bread to feed their families. Or, Hillary and Podesta.