I don't know if ABF is a great example of "doing very well for their membership" after concessions, and UPS is an outlier at the top of the heap. Who are these "thousand" other union trucking companies that are thriving because of their union strength?
Yeah, before the internet, before global supply chains, before OSHA and Equal Opportunity Employers, before deregulation.
It's not 1946. That world is gone, and it's not coming back. You can't offer anything but campaign slogans, and those aren't worth much in 2018.