I’m not too sure on the exact details. Basically, the government is not going to be able to fulfill all of its obligations to these programs. I think it means people will be forced to retire later, significant reform to how the medicare system works/who gets help, and I’m sure tons of other things. More important to note about the fact that we’re running such a huge deficit though is the fact that we’re adding it to an existing 11 trillion dollar national debt. If you are interested in this you should check out I.O.U.S.A, it’s a documentary on the national debt. Pretty scary picture.