I know a lot of musicians. A lot of them have a lot of passion, and integrity. Plus they work hard. Not a single one of them has produced a song as brilliant as Beyoncé's single ladies.
Billy Corgan is notoriously the most mercenary cunt ever to have picked up a guitar. If anything, people like Britney get put through the mill and see much less of the music-money-pie than someone with genuine business nous like, say, Billy Corgan or Ian Mackaye.
Integrity be damned.