If you think education is expensive, try ignorance.
Robert Orben (1927-2023) American comedy writer, magician, speechwriter
(Attributed (1974))
Frequently attributed to Ann Landers, who used it in her column, but she herself cited Derek Bok (who then wrote her to disavow it being his). Also attributed to Andy McIntyre.
Further discussion of this quotation's origins:
Quotations by:
Orben, Robert
Humor is the most honest of emotions. Applause for a speech can be insincere, but with humor, if the audience doesn’t like it there’s no faking it.
Robert Orben (1927-2023) American comedy writer, magician, speechwriter
In “A Little Night Humor,” Washington Post (28 Jan 1982)
(Source)