In the second world war, the United States out produced all warring nations, friend and foe, combined. The back of USSR uniform buttons said 'Made In The USA'. We were both an industrial giant and a technological powerhouse. If it was an invention, there was a good chance that it came from the US.
We were known for our industrial might, as noted by Admiral Yamamoto before he planned the attack on Pearl Harbor. Wall Street, a place where wealth is gained or lost, but a creator of nothing, was an after thought. If a company's profit was down the stock moved down a bit, but no more. Industry moved Wall Street, not the other way around.
Today, industry in the US is virtually non existant. American corporations are American in name only, with corporate mangement driven by Wall Street for short term profits and the future be damned. Not only did they send manufacturing jobs overseas, for labor as close to slavery as possible, but due to the push from Wall Street to get this years profit up well over last year's, companies bought out each other repeatedly until they became giants. Of course with each buyout, thousands of jobs were eliminated, but the bottom line went up. Did anything else matter? Its much easier to buy out your competition and add their profits to yours than to do expensive research and come out with better/new products to raise profits.
So in the 2000's we have mega corporations, far too big to be allowed to fail. Just ask Goldman Sachs. Between the mega corporations and an ever bigger spending government, America has been sold off--and we let it happen due to apathy.