The Caterpillar workers in York, PA did exactly that; they demande and demanded until they killed the proverbial goose that laid the golden eggs. And the Harley Davidson workers in York came real close, also. Thankfully, cooler heads prevailed in the Harley situation.
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The Goodyear workers in the aptly named “Union City” TN plant did likewise
A good friend of mine turned from a rabid Dem to a Republican over the Cat mess in York...he got to see firsthand how his precious union messed over their members and ended up losing everything.