Good theory but doesn't work so well as robber barrons proved when we had practically no government. We just ended up with private tyranny and that was a time when any white man could get free land and mineral rights.. Would be infinitely worse today in our job/debt to property society. Now they just co-opted government and the FED but all that's required is people to wake up and take back their government for the people by the people.
IMHO (as an outsider) there are several reasons:
I think the problem is you do not have old rich.
In the EU it is exactly the same but with a difference. People with a lot of money can have a lot of control about what is going on economically. But the old rich also understand what they had to loose or have to loose if they push it to far.
For example :
Centuries ago in Great Britain, It was not the poor or some liberal who started up social security for the "poor". It where actually the (if i remember correctly the conservative if you can speak of that title in those times) rich who started a socially security system because they released that the stability social security creates also benefits them(No hungry and angry mob) and the same people back with experience and trustworthy . Of course the system was set up that as soon as there was work, people had to work. Also the mindset of the people was to work if there was work. That as when there was no work, there was the "social security". I give this example because here the old aristocrats or old rich are a very important factor and have a lot to gain by controlling and stabilizing the economy. Of course to profit from it but also to make sure that if people around them are happy and hopeful of a future, they are also more willing to sacrifice for that very same system.
I think the main problem the US has is that you have to much "Nouveau riche"
who have become rich by for example wall street practices or oil. By this i mean not setup a company and hard work( I do not mean all wealthy people but some of course), But by easy money making by use of trading and other value paper trading. This disconnects totally the responsibility one has to the money earned. If it is your flesh and blood, you have to gain more by economic stability than when you made a quick buck trading. When you have something like a family fortune for generations, you want to keep it that way.
Especially if you are dependent on other not related people.
Then you have outside managers and share holders who do not care about the long run but about the short term profits. They just want their money back as fast as possible. The externally hired manager or executive has no feeling for a company or it's employees and does not care what happens when he leaves with his bonus.
Another reason i think is :
Because the US had the cold war, the US had to gain a lot from technological advancements. Here people like Frederick Emmons Terman and William Shockley had seen opportunities to use the drive for technological advancement. Partially because of personal ideals and also to some degree because of the cold war. The army needed a technological advancement over the USSR. This is no longer really the case and thus there is less drive for cash injections for future technologies.
Then of course there is the competition from competing countries who also want to produce.
Then the problem is that every 4 or 8 years, the US has a different government that wants to do things radically different then the former government. Be it because of profit or just because of idiotic personal views while not looking at the whole picture.
Then you have a free market that with idiotic forms of regulation or no regulation at all must try to keep stable while responding allergic to any kind of chance or set back. Add that "the market" is really made up of several different markets in different fields where some directly affect the people.
I mean if a producer of televisions goes bankrupt, that is to bad. If a public transport system goes bankrupt or an energy company, that can be a very serious matter because it can create and avalanching effect on the market.
It may all separately not be enough, but failure stacking after failure will create a grinding halt.
It is not strange that stability is a real issue.
I have to watch that episode again about the quants of wallstreet.
Found it :
http://www.youtube.com/watch?v=ed2FWNWwE3I