Read this good article about capital markets. One quote: "complex systems are not confined to historical experience. Events of any size are possible, and limited only by the scale of the system itself. Since we have scaled the system to unprecedented size, we should expect catastrophes of unprecedented size as well. We're in the middle of one such catastrophe, and complexity theory says it will get much worse."
The bottom line, capital markets are complex dynamic systems that need to be well regulated so that they do not become unstable. But of course Republi-cons don't understand that.
We get the government we want.