Ever heard that acronymn before? (There Ain't No Such Thing As A Free Lunch)?
Science fiction author Robert Heinlein is usually credited for the acronymn TANSTASFL in his book "The Moon is a Harsh Mistress".
More in-depth research sheds a different light ... TINSTAAFL (“There Is No Such Thing ...”) can be traced back to 1952 - in the writings of Alvin Hansen (ethicist). TANSTAAFL may well have arisen from it, by mutation.
A little deeper research found this on www.wikitionary.com ...
(idiomatic) There is no such thing as a free lunch; an alternative to TANSTAAFL 1952, Ethics magazine, cited in 2006, Ralph Keyes, The Quote Verifier: Who Said What, Where, and When, Macmillan, page 70, Professor Alvin Hansen's famous TINSTAAFL formula--"There is no such thing as a free lunch" [Keyes adds, "This acronym had already appeared in a 1949 newspaper column."]