classics/classics_archive/sheckley3/sheckley31.html. It's called "Cordle to Onion to Carrot", and I'll bet you anything it's not a 1955 story as is claimed at the bottom but a 1965 or later story. (I read it in one of the early 70s collections.)
My current crusade is to make sure creative people have wills. Read the blog post about it, and see a sample will.