I'll give you 50% of all voters; not workers. Its a vote like brexit though, an either or. An election is far more complex.
As for unions- I agree entirely, its not how they're supposed to operate, but unfortunately, from my experience there's still a hangover from the old days. Often just a club for barrel chested empty vessels whose sole purpose seems to be antagonistic towards authority for no other reason than they can, and they get an inflated sense of self importance.
I only ever worked with one decent rep, who genuinely helped when you needed it. He was straight though, and if folk were moaning or being unreasonable, he'd tell them. If they had a genuine case he'd help.
Poor bugger would get loads of shit from members for basically not being (for want of a better description) militant enough or even a management pawn, even though he was actually being far more effective in his role. Just too blinkered to see it.
Be great if unions would modernise.