It has pretty much been proven that in Capitalist systems the economy will go thru a Boom period followed by a Bust, about every 10 to 20 years.
You can see this in the Panic of 1873 and the Panic/Depression of 1893 and the Panic of 1907 and the Great Depression of 1929. The First World War seems to have put off a Panic/Depression by a few years.
http://en.wikipedia.org/wiki/Panic_of_1873
http://en.wikipedia.org/wiki/Panic_of_1893
http://en.wikipedia.org/wiki/Panic_of_1907
If you type Panic of in Wiki you will see whole list of them.
The Busts that occurred every 10-20 years are amazingly similiar to the Great Recession we are currently in. Housing prices collapsing, markets crashing, etc.
Of course since the New Deal we have had a system in place to moderate the Booms and Busts, and it did a pretty good job of keeping the current Recession from becoming a Depression.
When FDR came into office his economic advisors realized that the Boom and Bust was killing the creation and sustainment of a middle class. Most everyone would lose everything every 10-20 years. The very wealthiest would use the Bust to cheaply buy out businesses, and property.
So, the New Deal put into place safeguards to prevent the Busts. One thing that almost always happened to cause a Bust was overheated markets built on credit or speculation.
As each of the Busts occured they were becoming larger as more and more people depended on salaries for income.
Now the Republicans want to disamantle the protections against the Boom and Bust cycles.
Do you think this is a good idea?