We all know the simple moral principle that the buyers of stolen goods are as guilty as the thief. I recall this principle from childhood. The point is that the thief wouldn’t steal if no one was buying—at least a thief wouldn’t steal because of greed or arrogance, but perhaps only to meet his or her basic needs, e.g., food.
This moral principle touches upon a basic microeconomic model: supply and demand.
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FINN JANNING 