From The Daily Caller :
And the Postal Service is popular because it undercharges  — great when you can ship packages for cheap, but bad for the federal government’s balance sheets. And, of course, bad for taxpayers.
- “The Daily Caller”: https://dailycaller.com/2019/05/17/wilford-post-office/
- “undercharges”: https://www.rstreet.org/2018/01/14/theres-more-than-one-reason-the-postal-service-is-losing-money/