Coverage of public sector employees in the United States

The issue of segmentation of the social security system has technical complexities and it takes time to solve it. A recent study by the General Accounting Office points out that:

Social Security covers about 96 percent of all U.S. workers; the vast majority of the remaining 4 percent are public employees.

This does not mean that public employees do not have a pension plan, but that special solutions have to be developed to solve the issues of portability and recognition of contributions. The document can be found in: http://www.gao.gov/new.items/d08248t.pdf