Lousy meme. Quote taken out of context, and later clarified by RGB. This article gives the full context, and is written by the author who did the original interview with RGB that's the source of the quote. (NOTE article is from Slate, a total lefty rag, but it's the best source.)
http://www.slate.com/articles/news_and_politics/jurisprudence/2012/10/ruth_bader_ginsburg_clears_up_her_views_on_abortion_population_control_and.html