Monopoly teaches people a view of economics being a zero-sum game and too many people learn the wrong lessons from it. Real life isn't a zero-sum game.
The monopoly game is not zero-sum. Money increases when you pass start, and cards drawn are on average a source of money. In fact, the money owned by players inflates as the game goes on.
In real life however, these disparities are only a problem if people leverage them against others.