The article contrasts the Civil Service Retirement System (CSRS) with FERS, outlining how the two systems differ in retirement benefits, coverage, and longevity. It notes that while CSRS is largely legacy, it still supports over 2 million retirees, with higher average pensions and longer career durations than FERS retirees. https://www.federalpensionadvisors.com/post/how-many-retirees-are-under-csrs