Suppose that a government decides to provide a subsidy to its breakeven postal service to offset losses on unprofitable routes because it wishes taxpayers and not rate payers to fund the USO.
The government would never give subsety to the postal service. 
mnli hypothesis: The government would never give subsety to the postal service.  premise: Suppose that a government decides to provide a subsidy to its breakeven postal service to offset losses on unprofitable routes because it wishes taxpayers and not rate payers to fund the USO.