I think you should not be redefining what words mean to make your argument.
Wealthy means to have wealth. Wealth is the abundance of financial assets. Income can become wealth if saved/invested, but it is not wealth.
There are numerous definitions of middle class, with many being "not upper, not lower". Upper class is defined as those that have the most wealth (explicitly not income) and political power.
$People with 380k of income, but without significant assets are not upper class. They would be considered upper middle class.
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:
I mean sure, but anyone able to sustain that income level will quickly become wealthy unless they have ridiculously high spending levels.