A Schelling point is a kind of Nash equilbrium, right? It's the kind of equilibrium that an understanding of human psychology and the details of the situation says you should expect.

The union-firefighter looks like a variant on the hawk-dove/chicken game. If default is (Dove,Dove), which isn't an equilibrium, Hawk can be seen as a black mail action as it makes you worse of than default. So at (Hawk,Hawk) everyone is, in fact, being blackmailed, and this is, essentially, a coordination problem.