“No evidence” or “I haven’t looked for evidence”? Unions do more than just keeping people from dying in mining accidents — for example, I read this yesterday with what sure looks to be concrete benefits for the workers:

https://www.propublicaguild.org/updates/propublica-guild-rat...

This isn’t impressive. 13% over 4 years? In any case this can’t be evaluated without knowing what was initially offered pre union and what they initially asked for.