Frank Zappa
The $600 Mud Shark Prelude
FZ:

I'd like to tell you something. I'd like to play an encore for you. But we have a union problem in this house. We have to leave the stage at exactly that time or it's gonna cost another $600. For us. We'd have to pay $600 to play for you. I would like to say this: I'll be happy to pay $600 to play for you. We're gonna do an encore now

We'd like to dedicate this part of our program to the union men who are sitting backstage counting their overtime money

And also to the people who make up those kind of rules and keep 'em inflexible so that you can't really work with the thing. You know what I mean?