No but they are different than Federal employees in that Freddie and Fannie are quasi private/federal businesses. The GS level employees are held to a higher standard and are paid less.
Rejoin the free. Try and see how hard it is to earn an honest dollar. It is more be psychologically rewarding, but it's rare to earn more as a private sector employee than an equivalent fedgov employee would earn. And you fedgov sinecurees (assuming that you are one) get many more perks and pensions.
Fedgov employees overestimate the level of job they would be able to gain in the private sector with the work ethic and skills they have.