I hoped you've satiated your pedantry for today, but the quote exists in several re-quoted forms. Jefferson "mis-quoted" Franklin. Everyone mis-quotes Jefferson.
While many attribute the mis-quote to Jefferson, there is no written record of him making such a statement. In fact, there is actually no direct record of this coming from Franklin either. The earliest references were in an anonymously published book that referenced a letter from the Pennsylvania Assembly to their Governor from 1755 (when later re-published in Philedelphia it was Franklin who printed it...) At that time Franklin was a member of the Assembly and the quote does sound like his sort of wit, but the full quote seems useful and nuanced enough that we should remember it even if it happened to come from some other member of the Assembly that no one happened to remember.
