At least here in the US I think is far worse than most people imagine: that the economy was just giant ponzi scheme.
Minsky Ponzi Finance .pdf
I guess Minsky's theory was that we would go from Hedging,to Speculative to Ponzi Finance.
With hedging your income covers the finance expense and principal, think of a credit card customer that promptly pays off his interest and principle every month.
Speculative finance would be the credit card customer who pays off his interest but needs to roll over the principle.
Then we get to Ponzi finance, where the customer in question can't even service his interest payments. In other words he is dependent upon the underlying asset that he goes going up in value. i.e. the Refi boom in the US where people pulled money out of their homes, just to cover his interest. If the underlying asset even stabilizes in value he is toast.
Also alot of the "innovations" from the 80-90's were too easily abused, with
securitization lenders can now dump their risk onto someone else and have far fewer incentives to do good underwriting.
With less lender involvement loans went from lenders,who actually understood what was being underwritten,to bond holders and credit ratings agencies that didn't understand very much.
In other words risk was transferred from those best able to understand it to those least able to understand it.
Also lets think about the average 30 year fixed rate mortgage, its a crazy product for anyone to underwrite because you have to use variable rate borrowing to finance a fixed rate asset. In other words most bond holders don't want to hold bonds for 30 years so you end up financing your mortgages with bonds that could mature in less time, five or less years.
At the end of the five year period you have to roll over your bonds and refinance the asset. The problem occurs if your asset is paying less than what the market is charging for finance.
In fact Princeton's Economics Department did a great
presentation on the financial crisis . In it something like 75% of all borrowing is done under a year. So therefore its very easy to be caught in an interest rate squeeze if the financing costs change.
Of course the most damning thing is that this collapse was predicted by the government itself. In 2003 OFHEO did a
systematic risk .pdf , the man who was in charge of the paper "resigned" a week after its publication due to pressure from Fannie Mae and Freddie Mac.
As time progressed even Fannie and Freddie began to realize that the situation had the potential to deteriorate and in 2005 Fannie S V-P of Risk Polich did an interesting
.pdf presentation on whether or not there was a risk of a major pricing collapse. He implied that it was quite likely.
Anyone with a shred of sense knew that this collapse was coming and the exclamations of surprise and shock are in retrospect are comical.