AdvertisementMedicare's Math Problem: Taxes - Benefits = TroubleApril 30, 2011NPR StafffacebookEmailU.S. Rep. Paul Ryan, R-Wis., right, hears from a constituent during a "listening session" Tuesday at Gateway Technical College in Kenosha, Wis. Ryan's plan to fundamentally restructure Medicare and cut social safety net programs has proved to be a tough sell to many Republican voters the last few weeks. (AP)