Dante's Inferno and Poetic Justice

The Fourth Circle of Dante's Inferno, The Avaricious and the Prodigal, is extremely related to poetic justice. In this circle, the avaricious and the prodigal were forced to haul large and heavy rocks in a semicircle shape. The avaricious and the prodigal were obliged to go in opposite directions, they would eventually crash into each other. In my opinion the crashing symbolises that in life one must have a balance concerning how much money you spend. This ring is related to poetic justice because the people who didn't have this balance in life are being punished.