Just look back to history. The Romans used gold coin. Later no more gold loot and they impregnated their gold coins with cheaper metals. The Brits once said that the pound is based gold standard. But people asked for gold and the was not enough gold. If it's such a good standard it would have lasted till today.
U just answered the question.
Both empires prospered on gold standard. Until they debased their money...and then their empires collapsed. See the link? Haha.
