On social security, it was a big issue in the 90's according to the estimate then, but new estimate says not.

The last Congressional Budget Office long-term budget projection had Social Security spending rising from 4.2 percent of GDP now to 6.4 percent by 2050, a 2.2 percentage point increase – and Social Security, remember, is currently running a surplus to prepare for that eventuality. Meanwhile, Medicare and Medicaid spending are projected to rise from 4.5 percent of GDP to 12.6 percent, three times the Social Security increase – with negligible pre-funding.

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I like Hillary Clinton's position: get fiscal resposibility now, and social security will become an easy problem if it indeed becomes a problem.