"Once he had fulfilled his contract (and kept his mouth shut for the legally required period), he revealed that he'd agreed to make the movie for scale as the part was small and fascinating. But then the part was enlarged and Reeves found himself being paid millions less than co-stars Spader and Marisa Tomei."
http://www.tiscali.co.uk/entertainment/film/biographies/kean...

"Also called union scale. a wage fixed by contract that is the minimum permitted to be paid to or accepted by a particular category of employed persons: All actors and musicians for the performance, including the stars, are working for scale."
http://dictionary.reference.com/browse/scale

"Rémunération : tarif minimum syndical .... Dans un second temps, selon le succès de ce spectacle, tous les acteurs seront rémunérés par un même cachet de ..."
http://www.afrocine.com/annonces/casting.asp