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UAW workers make about $10/hr more than non-union auto assemblers, according to the very NYT article you cite in claiming the pay difference is "spurious."
I quibble with the use of "spurious," but I also have to ask why you're remarking on that $10 an hour difference? For Christ's sake, will we all have to be in Old Poor Richard's poorhouse before you're satisfied? I await the revolution where certain so-and-sos meet a certain such-and-such-an-end and meet their maker in such-and-such-a-manner.