The failure of Republicans to deliver on their promise that tax cuts would be mostly self-financing is a large factor in the deterioration in our long-run fiscal outlook, and it is putting considerable pressure on programs such as Social Security. In fact, the Bush tax cuts can be thought of as a loan from the Social Security Trust Fund that was supposed to be paid back with the revenues from higher economic growth, a loan that is presently in default.

To see this, recall that the government began intentionally collecting a surplus from the Social Security program beginning in 1983 in order to prefund the retirement needs of baby boomers. The idea was to run a surplus for several decades while the baby-boomers were still working to get ready for the deficit years the system would experience after they retired.