Mr. Monk Gets a New Shrink - S5-E7
Continuity mistake: When the cleaning woman's body is found, she's lying on the floor face up. A short time later, despite repeated admonitions that nothing should be or has been touched, the corpse has somehow turned itself over and is now lying face down. (00:02:05 - 00:07:45)
Answer: The two men are trying to work out a secret deal between them without involving the union, which means the workers' interests aren't being represented and defeats the whole purpose of a union. The mayor would lose labor's support and Cusack's union troubles would just be starting.
Captain Defenestrator