I'm not informed on labor issues, but I can't imagine why the Teamsters would be interested in us to begin with. Horribly low participation rate, demonstrated apathy, and most importantly, an employer with no money.
There's nothing to add to the Teamster's bank account. Just a charity case.
We'd probably be better off if someone like Bezos somehow bought USPS. He'd realize that the high wages at UPS could create a shipping bonanza opportunity via USPS if it were run properly. UPS is going to have to make up that money before shareholders flee.