French fire fighters protested about poor pay, such as a hazards allowance that has not been increased since 1990. Police went in and did the usual thing, beating people with their little clubs, firing tear gas, and the like.
Imagine if the firemen, standing united, took it to the next level, and went on strike, letting buildings and the fruits of capitalism burn down? Or, they simply refused to put out fires in police stations? It might happen, if people get sick of being beaten up.
https://www.youtube.com/watch?v=kon0rmLQE7U
https://www.france24.com/en/20200128-french-police-clash-with-firefighters-at-paris-demonstration