No, the real reason is that money possesses a "gravity" of its own. It tends to start forming clumps; once that gets started, the clumps tend to grow, absorbing

No, the real reason is that money possesses a "gravity" of its own. It tends to start forming clumps; once that gets started, the clumps tend to grow, absorbing the smaller clumps zooming by. Just like gravity. Any theory of society and economics that doesn't take this fundamental tendency into account is hopelessly unrealistic. You must have mechanisms, at the level of the whole society and economy, actively fighting this "clumping" force. Otherwise you end up with a handful of giant black holes and a whole lot of empty space in between.