I suggest that you look up my research on pension compensation (Michael Mannino published in the Journal of Pension Economics and Finance). I have computed pension compensation for a plan (Florida Retirement System) with lower benefits than the FERS plan. The average level of surplus deferred compensation was $250,000+ in the FRS plan with much higher levels for higher paid professionals and administrators. My calculations took into account non inheritable features of defined benefit plans. The private sector sells annuity plans that provide lifetime income without an inheritable feature.
In summary, you are wildly misinformed about government defined plans. I do not know the specifics of your situation. Unless you retired at normal retirement age (or later), you received substantial surplus deferred compensation.
Did you notice the other day that Treasury tapped into what can only be Postal employee retirement deposits so they could keep under the federal debt limit.
Your argument that the federales subsidies USPS is BS.