This paper discusses transvaluation through design from an analysis of the ‘Debtoscope’, a design intervention dealing with the issue of debt that took place in Brisbane, Australia, November 2012. Framed around the single question: “How does debt hurt you?” the project used a seven metre long stethoscope made of local recycled trash material to expose the invisible suffering from indebtedness in the public urban space. Through the unpacking of the stethoscope as a Nietzschean metaphor and the discussion of diagnosis as a tactic for hacking infrastructural space, the Debtoscope brings us closer, not only to what transvaluation through design could be like, but perhaps also to what it should be like.