The Mystery of Banking by Murray N. Rothbard (pg. 54)

So the threat of gold redeemability imposes a constant check and limit on inflationary issues of government paper. If the government can remove the threat, it can expand and inflate without cease. And so it begins to emit propaganda, trying to persuade the public not to use gold coins in their daily lives. Gold is “old-fashioned,” outdated, “a barbarous relic” in J.M. Keynes’s famous dictum, and something that only hicks and hillbillies would wish to use as money.