easy street, on
A condition of financial security and comfort, as in If he actually makes partner, he will be on easy street. [Colloquial; c. 1900] Also see fat city.
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.