Let's talk Gold. In 2008, per the US Treasury, there was about $853.2 billion in paper US currency in circulation. A pretty good estimate of worldwide gold production is about fifty million troy ounces per year. At a spot rate high of about $1250, that's $62.5 billion. To back our entire paper currency in gold would require (at a price of $1250), about 682,560,000 ounces, or more than seven and a half year's worth of production, assuming it was all ours, which it isn't. Fort Knox has about 147,300,000, so we're a bit short.
Here's the rub with gold. Let's assume the US resurrects the gold standard and we have the required amount of gold stored with the Treasury. What happens to the dollar when the price of gold begins to fall from $1250? The dollar, which is now tied to it, goes down unless the US acquires more gold. Check out the five year average gold prices. They started at a little over $400 an ounce, so there can be a significant downside to this metals market. What do we do when the price of gold really increases? Should we sell some off, because we are now over-funded? That would pay off a lot of debt. But the market might swing back down and we would have to reacquire gold. It's just become too volatile a commodity to peg currencies against. Maybe back in the Olden Days of gold coins, but that game played out by the 1930's when the gross national product began to exceed gold inventories.
It's easy to say that the dollar has not kept pace with gold. The 1974 NY market price for gold was $160, ending at $950 in 2009, almost a 600% gain. How about that 1974 dollar? It took $4.35 in 2009 to equal its purchasing power. So, a 2009 dollar was worth about a quarter of what it was in 1974. (Per the CPI.) BUT, there are lots and lots of those inflated dollars, competing with lots and lots of inflated Euros, Rubles, Yen, etc. The playing field is not as uneven as you might think. Believe me, it's much easier using paper-only currencies. Think about one country deciding to cash in all of its US dollars? All of that gold has to be shipped, etc. That's done on a small scale now, with one country literally transferring bullion to another country's vault (all within the same building). But it would be a nightmare on a macro scale.
Now, about "those guys in DC". Who's guys do you think they are? DC doesn't manufacture politicians. YOU guys send them there. So, don't go ragging the home team (native Washingtonian here - a rare bird around these here parts.)