People will like or dislike you for a number of reasons/bias. I once had a high dollar investment customer that would only deal with me because of my attitude. Others that refused to deal with me because of my attitude. Trying to say that there is one "right" way to act and it only comes with money just isn't accurate. One of the first things you realize with banking is how varied or even normal rich people are.

There is no one shibboleth used to filter out the people that don't belong. Judgementally approaching them, and acting like they are all elitist exclusionary cronies will make them happily oblige your fantasy.