Engineers view III
Lets get back to the basics (Provided the karma basics appeal you. Even if it doesn't, please spare a thought for this post.)
Karma: Reincarnation!! naa, rebirth!!! naa, By karma, i mean what you sow so shall you reap. There is an old saying, " Babool ke beej bo-o gay to aam nahi babool he paongay". Lets draw this analogy of karma with economics or rather i should say lending banks. Long time ago, there was a growth economy. Every thing was hunky-dory lush green clients, apple red yields. Ahoy!! awesome time to make money. Then came the demon greed. Bankers with ample of liquid money started to lend money to clients. There was no harm in doing so cause, that's what their business model is. Money flows in to bank through deposits, savings, other accounts, they in turn lends money at higher interest rates to borrowers. That's the simple business.
In greed banks and their associates started lending money to everyone without checking if they deserve the money. And since they didn't deserve to borrow money they charged higher interest rates. A man/women (no gender bias :-)) earning Rs.100/- was given a loan Rs.200/- that too at an interest rate of 15-20%. It was some thing like pumping in forcefully 100 litres of water in a, water tight, 50 litre tank. What would happen then, is any ones guess.
Similarly, bad karma of banks, of lending money (to non deserving) in expectations of higher yield on loans, resulted in explosion of client. Since, a low earner couldn't afford to pay such a high interest rate he/she defaulted (exploded) and forget about the interest payment he couldn't even afford to payback principal. Hence he/she went kaput and so did the asset(explained later), to possess which, he borrowed the money. Since there was mass default, banks stopped lending money even to the credit-worthy one, as it lost confident in everyone. As the credit dipped, there were no buyers to buy this assets. Hence, the assets lost its real value to such an extent that borrowed money was higher then the current asset value. Again resulting in foreclosure of loans. Or defaults on loan. Or closure of loans and handover of assets. At the end banks incurred heavy losses as their greed took over their ideal business model of lend to the credit-worthy one.
In short, Bad karma's of bank ricochet in bad debts. It sowed bad money (bad creditors) and in turn got a tree of bad debt. Taking us back to the karma,"Babool ke beej bo-o gay to aam nahi babool he paongay". Moral of the story,"No matter how complicated is economics, rocket-science, or any other sci-fi technology but their basics is - THE KARMA PRINCIPLE".