someone was talking about ron paul, who believes our money should be backed by gold. apparently that was not you. my mistake.
as for increasing money supply as population increases, NO, this is completely wrong. the money supply should not mirror the number of people, it should reflect the amount of goods and services available. as goods and services increases, and the level of technology rises, the money suupply should also increase to keep up. if the amount of goods and services shrinks or remains stable, so should the money supply. that is how you have a healthy and profitable money supply.
to understand money supply issues, read this very simplified explanation about a babysitter coop written by paul krugman who writes for the NYT. its really very good.