[bert]

I don’t know details of USPO revenue.

However, itcanbe argued that the package revenue, even though inadequate on a package by package basis, provides funding that pays overhead. With out the package revenue, the USPO couldn’t exist

[Lockbox]

You can make the case for covering the fixed costs but that only works if there is other revenue which turns a profit after covering all costs. I think the word profit is a foreign concept with the Post Office.