How to Leverage the Roth Thrift Savings Plan December 12, 2016 My Federal Retirement Federal retirement expert, Chris Kowalik, discusses how federal employees can leverage the Roth TSP to create tax-free income for themselves in retirement. Related:How to Leverage the Roth Thrift Savings PlanSenators Urge Thrift Savings Plan to Reverse Decision to Steer Federal Retirement Savings to China