Hmm... I can't recall ever seeing that one, and I've read most of his novels and many of his shorter works. Which story/ies did that come from?
ETA: Ah, it wasn't Heinlein, it was Larry Niven. Heinlein had the vaguely-similar non-expletive tanstaafl: "There Ain't No Such Thing As A Free Lunch."
ETA: Ah, it wasn't Heinlein, it was Larry Niven. Heinlein had the vaguely-similar non-expletive tanstaafl: "There Ain't No Such Thing As A Free Lunch."
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