Why does my co-worker look at poor people with dirty looks?

well not exactly poor people only but fat people or people who dont give appearance as much thought as she does. but they still have good hygeine. she always carries designer purses and always buys expensive clothes 26 and still lives with her parents they let her live there for free and she gets all her money she makes to spend wherever she wants and and her dad pays bills and food. she is very skinny bmi around im guessing 15 or maybe 14. she is always alone she doesnt smile much which makes us mad she has nothing to be upset about she is spoiled she has a attuide type she doesnt like to be tapped or touched and always seems aloof. but looks at others like their dirt unless they are seen in chanel or a outfit that she likes she wears chanel?