Mr. Monk Makes the Playoffs - S7-E13
Revealing mistake: When Monk steps in front of the limo to stop it from leaving, on the bottom right of the screen there's a black line that doglegs to the right (seen over Monk's coat sleeve). It's like the camera was cracked or something was stuck to it. When the camera angle changes it's gone, but is there where the camera is back on Monk.
Mr. Monk Makes the Playoffs - S7-E13
Revealing mistake: 7-13, "Mr. Monk Makes the Playoffs": The supposedly live stadium crowd outside Bob Costas' press box is a noticeably fake photo-backdrop. Not a single "person" in the multitude of thousands is moving. (00:40:10)
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