Across literature, the term "usury" has been employed in multifaceted ways that reveal both its economic import and its rich metaphorical potential. In some works, it is portrayed as a tangible economic injustice or sin—one that exploits the vulnerable through high interest rates and deceptive practices, as seen in Du Bois’s critique of labor exploitation [1] and Dante’s moral denunciations [2], [3]. At the same time, early modern writers such as Bacon use usury in a more technical and analytical sense, discussing its regulation, economic consequences, and even proposing differentiated rates [4], [5], [6], [7]. Beyond these more formal treatments, usury also appears in literary irony and satire; authors like Chekhov [8] and Marlowe [9] invoke it either as a symbol of opportunistic corruption or as a commentary on societal vices. Whether addressing usury as a sin against divine bounty or as a modern financial malady, the term consistently underscores themes of moral degradation, economic exploitation, and the social impact of monetary practices.