They should, but but it is not guaranteed. There is also a long way between having more wealth than most, and becoming upper class where you can live "comfortably" entirely off the earnings of your wealth.
My previous comment seemed to have touched a nerve with some people, which strange given that I (IMO) was politely providing commonly accepted definitions of words/terms, with supporting references. I guess people do not like the actual meanings of the words. Or perhaps I sounded like an condescending asshole :shrug: