ends up plowing for those who kept their swords." Sad but true, at least outside the original context of the beating swords into plowshares phrase, which involved Someone undertaking the task of protecting those who give up their swords.

Let me know, please, if you have a verifiable source for this saying. I've seen this credited to Franklin, for instance, but lots of stuff gets erroneously credited to Franklin (and Churchill, Wilde, Parker, Bierce, and Twain).