Everything you have said adds up to "reputation". Then you think about how many times union bigwigs have been caught raiding the retirement funds and that makes them unacceptable.
Of course. The only product a Union 'sells' it what it can achieve for / how it can look after its members.
That means reputation is a huge bonus, or hurdle to obtaining membership. Reputation wise things that may be a bonus, or hurdle to recruitment include:
- How a Union conducts it's business (ie. the reputation it gains for how it conducts its business)
- How competent the Union is (and it's reputation for such)
- Perception of level of altruism for the workers (like your example of corrupt bosses)
- The 'public motives' of the Union (ie. the marketed perception, or News, or politically driven perception)
- How well known the Union is (well known is often newsworthy. That can work for, or against organisations)
Unions reputations are essential to their membership 'health. Undermine their reputation you will
undermine membership. The more angles you can undermine their reputation from (or that they undermine it themselves), the more you will undermine membership.