Jean-Pierre: At the end of the day we are likely to be punished for our kindnesses.
Sergi: Where do I know you from?
Vincent: Vienna.
Sergi: Of course.
Sam: Either you're part of the problem or you're part of the solution or you're just part of the landscape.
Spence: You ever kill anybody?
Sam: I hurt somebody's feelings once.
Vincent: Everyone's your brother until the rent comes due.
Sam: All good things come to those who wait.
Spence: Got the swag, kept the money. It's a job well done, a job well done. That's a fact.
Sam: The only thing is that the map, the map is not the territory.
Gregor: So what could have been conducted in collegial atmosphere is now fucked into cocked hat.
Seamus O'Rourke: You're a good girl, Dierdre. Do your job, eh?
Seamus O'Rourke: You bollocksed it up.
Dierdre: I bollocksed it up?
Seamus O'Rourke: You hired them.
Dierdre: Through your fucking contacts.
Chosen answer: It is true that it doesn't affect the plot. However Spence's (Bean's) failure can be contrasted with the professionalism of the main characters. Also it raises the possibility that whoever hired them isn't taking necessary precautions in planning and hiring. Earlier we heard Sam (De Niro) ask Vincent (Reno) if he was "labour or management" which suggests a theme of professional operators getting their hands dirty while their bosses play politics.