The fact that you don't see the correlation tells me you don't understand the inherent argument that dollars not keeping their value is, in fact, irrelevant. See if you can answer this; if a currency yields 6%/yr in real terms (adjusted for inflation), compounded annually, over a multi-decade period, why would anyone care if we consistency experienced moderate inflation year-by-year over those several decades? People's savings haven't been destroyed if they're yielding that 6%, so that's not it. Access to credit hasn't been destroyed, we've had an abundance of credit access for most of the last 80 years save for the disastrous consequences of the lack of credit in the 1930's. So what is the negative, quantifiable result that has occurred as a result of the devaluation of the dollar in the last 80 years? Has it destroyed real income and standards of living? Nope, both have risen considerably, even despite us being a very mature industrialized economy. Can you come up with anything?
Bottom line is that fixed exchange rates don't work, so keeping the dollar fixed to gold artificially does nothing but strain the ability of governments to expand credit and limits the ability of gov't to adjust the inequities that result when free market solutions fail. And they do fail, this is conclusive and easily verifiable.
Sigh... I hate having to teach economics to people who have no fucking clue.
1. Stocks are not currencies, period. Currency is money, the discussion is about money, quit confusing the two.
2. Your saying inflation is okay because look at the long term returns of the stock market. Inflation creates these credit bubbles sends stock soaring and when it all crashes because the free market realizes the bubble, they rush to create another bubble and expand even more on that inflation. There can come a day when that theory no longer works, and the world is no longer willing to accept our inflated dollars. So the hazards of inflation are those.
3. Lack of credit in the 1930's? No, we had too much credit in the 1920's and it collapsed.
4. The inequities of the free market you talk about are probably references to credit bubbles created by anything but the free market. The inequities or crashes that you may feel are the causes are the free market are actually the response to these bubbles once the businesses and people that make up the free market see through imbalances that are caused by these credit bubbles.
5. Concluding that they fail because currencies are no longer backed by gold or silver is not conclusive evidence that properly run commodity backed currencies will lead to failure. Economics is a social science and cannot be tested empirically because man's wants are constantly changing. I could conclude that money printing and inflationary bubbles always result in a collapse because Weimar Germany collapsed due to hyperinflationary printing. Examples such as these are not valid when discussing economics because you would be belying the nature of the study.