I hate to bring fiat into the argument, but despite all it's problems the U.S. dollar does a great job at supporting large-scale economies. Even with a 2.5% - 4% annual inflation (definitely not "saver friendly"), capital formation does not seem to be a problem. Go figure.
You could not be more wrong. During the unfettered fiat standard (1971-), the by-far-the-most-glorious-and-economically-strong-empire-the-world-has-ever-seen has reduced itself to a miserable leech, a cancer to the world's economy, destroyed its productive capacity, essentially producing almost nothing that the rest of the world wants, utterly dependent on extorted energy and finished goods from the rest of the world, with half of the middle class already destroyed, youth unemployment soaring etc.
I could not have envisioned a better way to reduce the land of the free and home of the brave to its current wretchedly pitiable state than fiat money.