Well I’m a lifelong public sector worker so obviously unions have been quite visible throughout my career.
For the last decade I’ve worked for one organisation that is fairly well-known for its strong unions. What I have noticed over the years is a distinct deterioration in their influence throughout the organisation, and in tandem with this has come noticeable change in working practices. It is considerably more insidious than simply having one’s employment rights binned; what happens is that the continuous search for “efficiency” and “progress” always disguises a slight erosion of working conditions and rights, and eventually I have no doubt it will deteriorate to the point that new recruits will take the same view that many gig-economy workers do now: namely that you do whatever you’re asked to and if you’re lucky you get paid for it.
And I don’t think that’s healthy for the workforce or indeed for the organisation. Smart people don’t stay in organisations that don’t value them. What you’re left with are no-hopers and ambitious kids who’ll leave when something better turns up. The unions here have their faults, but they used to provide a useful buffer against the management’s instinct to take the shortest path to results.