Paul Krugman in the Times, Fire Phasers
"Jeb Bush doesn’t just want Americans to work more hours; he also wants to ‘phase out’ Medicare, or so he told a Koch brothers backed group. What he’s talking about, presumably, is a Paul Ryan-type conversion of Medicare into a voucher system.
Fact-checking organizations please note, by the way. The next time Democrats say that Republicans want to destroy Medicare, and Republicans start screaming that this is a lie, remember that when talking to their own people like Jeb themselves call what they’re proposing a plan to, yes, end Medicare."
Follow that link and his quote is, "They know, and I think a lot of people recognize that we need to make sure we fulfill the commitment to people that have already received the benefits, that are receiving the benefits. But that we need to figure out a way to phase out this program for others and move to a new system that allows them to have something – because they’re not going to have anything.” Ok the link is to a Steven Benen post in the Rachel Maddow blog, but that has a link to the video in which I presume he says exactly that.