Union salting. Union guy and "non-union" guy at a workplace agitate. "Non-union" guy feeds boss the names of anti-union workers as agitating for a union. The boss gets rid of them without telling them to reason and replaces them with a union guy. Eventually, workplace is riddled with union. Demands are made and met.

It is a conspiracy, but it's pretty minor and does sometimes happen. Also happens to be a conspiracy whose motivations I agree with.