Mostly, you write a script and someone’s gonna rewrite you.  They get hundreds of—not hundred but they get ten writers to write something.  If you have a big budget, you can go and get a lot of people to write on script .... I just actually heard that somebody said, 'Well, your screenplay got bought and now someone like Carrie Fisher will come in and rewrite you.'  And I feel terrible, you know, because that’s not what I mean to do.  My idea was never to raid something and trash it, you know. ‘Cause that – that’s more work for me!
Carrie Fisher in the documentary Dreams on Spec