Csrs Vs Fers Meanwhile, FERS, designed for employees hired after 1984, incorporates Social Security, a smaller pension, and the Thrift Savings Plan (TSP), which features employer-matched contributions. The choice between these systems affects retirement income significantly. CSRS generally provides higher pensions but lacks flexibility, while FERS emphasizes diversified savings and po... https://www.federalpensionadvisors.com/post/csrs-vs-fers