In a closed system your surplus is someone else's deficit, that's not a hard concept. The problem is seems to be cultural (some cultures consider debt a sin or

In a closed system your surplus is someone else's deficit, that's not a hard concept. The problem is seems to be cultural (some cultures consider debt a sin or a divine punishment) and educational (even renowned economists trying to explain macro-economics to the layman resort to false analogies e.g. Comparing the economy of a country with a household economy, when in reality the way these work is the exact opposite).