Sure. It can even be the case that unions were a net positive before 1960, too. It can even be the case that the gains achieved by the unions are what made co

Sure. It can even be the case that unions were a net positive before 1960, too. It can even be the case that the gains achieved by the unions are what made conditions less terrible from ~1960 to ~2000, and that the absence of the unions is what allowed conditions to get worse after 2000. (I don't think that's the whole story, but it's a defensible reading of events...)