I knew it was some Universal postal union nonsense but didn’t realize it impacted express mail as well. i have seen the epxress mail disparity between usa and central europe though. it is about 3 times more expensive to ship to central europe from usa than the reverse.
I understand the concept of why the United States started it way back when-we were being a power for good. It was a good idea, and a good thing.
Then we handed it off to the UN, and that is when all the crap started.