This is so twilight zone... but Rick Santorum is actually right on this one.
When the Gold Standard was the law, the government somewhat routinely melted down their gold coins, mixed it with cheaper metals like iron, nickel, etc., and then redistributed it at the same price as pure gold, creating more money. Further, one of FDR's first acts as president was to change the value of an ounce of gold from about $20 to $35, creating instant inflation.
So yes, all this "Gold Standard prevents inflation" bullshit is just that: bullshit.