I read this story about 20 years ago but am sure it was old then. The plot revolves around a future where artists are not allowed to be influenced by other artists. A composer is caught listening to Bach or something and has his hand cut off. It finishes with the man with no hands, blind and I think deaf, only being able to be a traffic controller, that is holding the stop/ go sign at roadworks. Its driving me nuts as to what anthology I read it in and who is the author.