What does it take in terms of assets, abilities, and/or income for you to consider them wealthy?
I would call anyone who doesn’t need to work in order to live (i.e. who can live off investments and interest) rich.
Some caveats I would add:
(1) Excluding receivers of pensions and/or other benefits.
(2) Without moving to a different country. I could retire today, if I moved to a low cost of living country.