An upper class of unearnable wealth, a middle class of very-well-off professionals servicing them, a lower-middle class of merchants, tradesmen etc. supporting the infrastructure, and a working class of labourers of various kinds.

Source: https://caymannewsservice.com/2023/05/benefits-of-new-76m-airport-project-to-trickle-down/

CCNP: In other news, the 66% of American families that own their own housing are now considered upper class.

Source: https://www.fark.com/comments/12798988?utm_source=feed&utm_medium=comments&utm_campaign=fark

This is the "American Dream" at work, and one example of the many distinctly American stories that involved the advancement of the lower class into the upper class through hard work, dedication, and a network of supportive believers.

Source: https://screenrant.com/the-gilded-age-season-2-ending-explained/