The greed of the unions, especially during the Obama reign, is that they believe Boeing will not move.
Overpaid aircraft mechanics (actually assemblers), have no machine operation skills, and cannot operate manufacturing tools and machines; are eventually being replace by robots.
Did you know that Boeing had moved its headquarters to Chicago a few years back. Perhaps to be centrally located with all their new planned assembly plants.
Boeing does very little manufacturing, they farm out all of the work, they receive all the components from all over the world and them assemble.
Just some thoughts.
You can read more about it at HOT AIR by JAZZSHAW.