There is the augment that we could never go back to a gold standard because there has never been enough gold mined to be able to adequately do so at current value
But if we used the same standard as the plastic/paper money scheme that is in place at the moment where even although the governments "print/produce" money at will they still do not have enough to cover ALL the debt in the world anyway
And if gold was at it's correct market price there would be a vastly greater ability to have it as a gold standard