well-to-do

well-to-do  {adj.}

Having or making enough money to live comfortably; prosperous.

John's father owns a company and his family is well-to-do.

- Often used with "the" like a plural noun.

This is the part of town where the well-to-do live.

Compare: IN THE LAP OF LUXURY, IN THE CHIPS, ON EASY STREET.