But I am quite sure I saw similar sentiments at least one other place in his work, and I think a couple places—years and years ago I read most of his novels, plus most of the collected short fiction and short stories, but it’s all pretty fuzzy now.
His first novel, Player Piano, is about a different, but related theme.
It's about machines replacing human work, but it's not at all about the machines. It's about the people. It's about human dignity. Or, as Vonnegut says, it's about "a problem whose queasy horrors will eventually be made world-wide by the sophistication of machines. The problem is this: How to love people who have no use."