Imagine having a Death Note. Just open up Wikipedia's list of richest people in the world, and write the top name once a week. After 3 or 4 weeks they would notice what's going on. Then they would scramble to spend all of their money to get off of the list, noticing, that they have too much to spend. For the last couple hours of their lives they would be aware, that having this much money is unreasonable. They would have learned something, developed, grown. Then they would bite the dust. In like 6 months society would be fixed. A man can dream.