The rich, so called because they can afford not to work. The term was made current by the economist Thorstein Veblen in his book The Theory of the Leisure Class.
The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Examples from the Web for leisure class
Few are the leisure-class people who pursue writing as an art.
Very fitly does Mr. Veblen, in his interesting book, call decorum "a product and an exponent of the leisure-class life."Bushido, the Soul of Japan
It is rather that the leisure-class scheme of life here comes to an expression at the second remove.
As a leisure-class usage of this kind we have, particularly, that bizarre survival of bellicose chivalry, the German student duel.
The leisure-class canon demands strict and comprehensive futility, the instinct of workmanship demands purposeful action.