There is no lack of analogies to explain the financial crisis. Here is another one:

Let’s say that you are buying a house in a foreign country where you do not know much about the real estate markets and therefore prices are fairly opaque to you. You decide to hire a real estate broker to help you find and buy a house and to act as a guide to the market. You know that real estate brokers sometimes represent the person selling a home as well as a person buying a home, but also know that your broker has a legal responsibility to act in your best interests and disclose as much about the house as possible. Ultimately, the broker makes money on the deal, but does not have a direct financial interest in the house.

So you meet with the broker, who shows you a plain apartment in a plain apartment building. You decide to go for it. He says he will hire an independent home inspector to appraise the home, to make sure it is sound and to help you determine your bid. The process moves forward, you buy the house and pay the broker his fee.

But just months later, you find out that the neighborhood is drug-addled and the apartment filled with leaks. You try to sell the apartment, but can only do so at a 90 percent loss. It turns out that the third-party independent home inspector had been hired by the seller; that the seller had made a bet with a bookie that the price of the house would go down; and that the broker knew it — he let them overvalue your house.

"You could punish him very severely by refusing to send the fire department, but the neighborhood is filled with closely-packed houses, meaning your neighbor's negligence would spread and burn down the entire 'hood. The smart thing to do is to put out the fire and save him from the consequences of his own actions,"