Expand Social Security!

This is correct. Not only should Social Security not be cut, given the failure of the 401(K) model, it should be expanded:

Nowadays, whenever Social Security comes up in policy debates around Washington, the discussion often focuses on how best to cut benefits in order to shore up the program’s finances.

But a big new report (pdf) from the New America Foundation suggests that the conventional wisdom is exactly backward. Congress should be looking at ways to expand Social Security, not shrink it — particularly at a time when traditional corporate pensions are disappearing, and 401(k)s have proved fairly risky.

Like Brad,I don’t necessarily endorse every particular proposal in the report, but the concept is sound.  See also Atrios, who’s been on this for a while.