I'm nominating Arcadian Adventures with the Idle Rich
by Canadian humorist Stephen Leacock. From Goodreads:
Of the many books by Canada’s most celebrated humorist, none has received more acclaim than his brilliant, caustic treatment of the glittering rich who gather at the Mausoleum Club on Plutoria Avenue.
Today, Leacock’s pointed satire of the privileged class, and their social abuses and pretences, retains every ounce of its freshness and bite. An undisputed comic masterpiece, Arcadian Adventures with the Idle Rich reveals a depth of compassionate criticism rare in Leacock’s writings.
Written in 1914, it's in the public domain and available here at MR; free audio version at LibriVox.
An aside: As a sign of the times, autocorrect changed Arcadian to Kardashian.