. What if someone in the room buys some corn from one of the other people in the room. The guy growing the corn just created money from the ground. In essence, he created wealth. Now there is more money in the room because someone brought some corn into the system.
As Ayn Rand said, the only reason money has any value is that someone at some point WORKED FOR IT. There is a whole industry now of trying to pretend that that is not true but it is true.