In principle you're correct sittingidly but you're extremely naive if you don't think the commodities markets are also being blatantly manipulated by mega corporations
Google "JP Morgan silver market manipulation" for a start. Every fool amateur investor in the world has been piling into gold for the last couple of years now, I think the price rise is largely driven by herd mentality and like all things where that happens it's gonna come badly unstuck when the herd eventually stampedes elsewhere.
Primary industries yes, precious metals not convinced, property still got a way to fall before I'd touch it again.
If you have an Aussie passport then go buy a forest or a farm, or an equity stake in a syndicate that owns one if you can't afford to buy outright.