That is beside the point.
Under the classical gold system, banks held their reserves in gold. When dollar-users suspected that too many had been issued, they could present their dollars at the teller's window and receive their equivalent in gold.
This had the effect of drawing down the bank's reserves thus decreasing their ability to pyramid loans from it and also served as a warning to the bank's officers that the public was growing skeptical of their performance.
This was the crucial component to the gold standard's working as well as it did. The ersatz gold standards adopted in Europe after WWI did not allow citizens the ability to exchange their currency for gold and failed miserably.
To this day, many still blame the gold standard for the Depression in Europe but it really wasn't one.
This is because those in control who desire to create more money will simply reduce the purity of the metal used for backing.
Another reason for gold as currency. Tampering with its purity is very easy to determine. That kings got away with it several centuries ago is a testament only to the lack of education and economic understanding of their subjects.
Corrupt financial elites are the source of continual problems, changing currencies won't affect that situation.
No monetary system can work to the benefit of the individual if his leaders are corrupt. There are some who are not. If one of those someday gains power, I hope he will push to reinstate hard money for the reasons I've stated.