Happened here in Minneapolis. The city encouraged building a city-wide wireless Internet system, by purchasing a big share of the bandwidth as an ‘anchor tenant’, fronting some money, and giving them permission to mount equipment on city light poles, etc.
Part of the agreement with the city required that the work be done by union workers.
The Communication Workers of America (CWA) union (telephone & cable TV workers, mostly) expected to get a lot of jobs for their workers from this. But the company that won the bid hired from the International Brotherhood of Electrical Workers (IBEW – mostly electricians) to do the work. I guess they charged a lower hourly rate.
The CWA union was very mad: both at the competing IBEW union, and at the city elected officials.