While Jarin's estimate was a bit high, that's still a fantastically good hourly wage. The average Goldman Sach's employee makes $520k/year. Guesstimating that they have a 60 hour work week and 4 weeks vacation (fairly typical for the big banks), that's about $180/hour.
Right, but they get paid continuously, porn stars only get paid when they have a gig- there is no way they're making as much once you consider the hours spent trying to get work.
If you have enough stamina to have sex 60 hours a week, chances are you already have a midget riding you and caning your butt while you run around in circles chasing a mechanical rabbit.