I think the cruel error is to (1) make something (nearly) necessary for a prosperous life, (2) make it ruinously expensive, and (3) offer to loan money to peopl

I think the cruel error is to (1) make something (nearly) necessary for a prosperous life, (2) make it ruinously expensive, and (3) offer to loan money to people who have little choice or financial sophistication (4) at terms that are highly favorable to the sophisticated creditor.