What are the losses they realize shipping last mile parcels? If you're referring to agreements like their NSA with Amazon (the example from your parent post),

What are the losses they realize shipping last mile parcels? If you're referring to agreements like their NSA with Amazon (the example from your parent post), that shouldn't be resulting in any losses. They're not legally allowed to set rates which result in a net financial loss; taking into account potential cost efficiencies from the increased volume, at the very least the NSA rates have to break even. For other classes of parcel service, it's entirely possible they're losing money (I'm not sure). But that's because it takes a literal act of Congress for them to touch those rates. Even addressing the "cheaper to ship from China than domestically" was a situation outside of their control - it resulted from an international treaty[1] the US is a party to, and required leveraging authority beyond the USPS's purview to address the situation (in this case, by threatening to pull out of the treaty). [1] https://en.wikipedia.org/wiki/Universal_Postal_Union https://en.wikipedia.org/wiki/Universal_Postal_Union