I know close to nothing about unions or the KS story but I am from the US and myself along with almost everyone I know tend to associate unions with extreme wasting of resources. This is coming at it from a spectator's point of view (ie. not a union worker / not a unionized business owner). For example, I've witnessed an overpass taking over 2 years to finish (it was blocked off / limited access / under construction…
Unions are responsible for some of the benefits we tend to take for granted - weekends, 8 hours workdays, corporate healthcare, retirement plans, etc. At the same time, any organization with power can become corrupt, or at least have its interests diverge.
Some examples that come to mind are the myriad of stories my mom tells me about working as a teacher.
One thing that annoyed her to no end was the IT labor union at her school. Teachers, even ones with technical skills, were forbid from touching any of the computers (even so much as plugging keyboards back in if students unplugged them). When computer Labs were being set up, one worker would put in all the computers, but a separate worker would come in the plug them in. Seriously, they'd come in for two hours to attach power cables.
However, when the school started 'not renewing contracts' after 3 years of continuous employment but then 'rehiring' after a month, so that teachers wouldn't get tenure, the union got the school to stop.
The union's power base came mainly from holding the school hostage - you 'couldn't' work there without joining the teachers union, else the union would have the teachers strike...