"unions are essentially tools of industry"
When the industrialists made their faustian bargain with the domesticated unions to break the radical ones, that was the bargain - compliant sheep, to be fleeced by their masters and their shepherds both. (If anyone can provide a link to fill in the breaking of the radical unions, i'd be grateful.)
As an example, and one among thousands, when the auto companies crashed in the last Great Economic Lurch, there was a story about a small parts company in Oshawa. They had recently been sold from a family ownership to a small company in California/Switzerland, but when things went sideways they shutdown in the middle of the night; but the workers were all members of the auto workers union so they weren't worried - the big union had their back, right? Well the parts and fabrication molds were locked inside, and the company was offering something like half of back wages and ten percent of the pension funds; so naturally the workmen struck and locked the place down. But then the Union men come in and say 'we don't want trouble down here, we've bigger fish to fry... pack it in or you'll have no help from us.' Now provincial law made it a criminal offence to walk away from pension obligations, ... guess how long it took the provinciales to throw up their hands and walk away from that one?
So, they had no tradition of resistance, and their imagined avenues of support had abandoned them, so they buckled and gave in.