first off, there’s a lot more to it than that. your thesis is fundamentally too narrow and thus incorrect.
second of all, on the topic(s) that you did write on, right but wrong.
it was not fraud.
that’s the way markets innovate.
the culprit in this particular instance, i’d say, was not that the financial markets sold these kinds of instruments but that they were almost entirely unregulated. there was a complete lack of truly international regulation.
if i wouldn’t lose my job doing it, i’d post up an imf paper released yesterday that is up for board discussion on february 25th entitled Initial Lessons of the Crisis that focuses on three dimensions - regulatory, macroeconomic, and global architecture for stability.
this paper in particular addresses some of what you talk about in terms of financial markets and the lack of regulatory oversight.
if you have access to imf’s extranet (that is to say, you work for a central bank or governmental finance ministry of some sort), you should be able to get access to it.
in the absence of that, i suggest that you read
THE EVOLUTION OF THE FINANCIAL CRISIS OF 2007–8
by Ray Barrell* and E. Philip Davis**
this is a publically available paper that you should be able to find by googling the title and/or authors.
it’s also potentially more useful as it is much broader and deals with certain things that the imf paper does not, e.g. it has a lot more contextual background information that the imf paper does not need to include.