Dinky?

"DINKY is occasionally used (in the UK, India, and China) to describe a high-earning couple who chooses not to have children and are therefore able to afford a more expensive lifestyle than those with families. The term was coined during the 1980s, at the height of "yuppie" culture, but never gained as much currency as the latter term.
A version of the acronym, DINK, is still used in the United States, especially for a subset of yuppies." - Wikipedia