Nation's Retirement System: A Comprehensive Re-Evaluation Needed to Better Promote Future Retirement Security, Statement of Gene L. Dodaro, Comptroller General of the United States, Testimony Before the Special Committee on Aging, U.S. Senate [open pdf - 2MB]
From the Highlights: "Strengthening the U.S. retirement system to be more accessible and financially sound is important to ensuring that all Americans can retire with dignity and security, and to managing the fiscal exposures to the federal government from various retirement-related programs. Currently, the U.S. retirement system, and many of the workers and retirees it was designed to help, face major challenges. This testimony discusses (1) the fiscal risks and other challenges facing the U.S. retirement system, and (2) the need to re-evaluate our nation's approach to financing retirement."
Government Accountability Office: http://www.gao.gov/