Oliogopoly is due to market recession in which weaker competitors decided to fold.
For example, UPS, FedEx and DHL compete against each others and due to the recession, DHL sees no chances to win and decides to close all US operation and closes the Wilmington, Ohio plant and lay off 15,000 employees. It actually will not affect the market at all. FedEx and UPS will continue to operate but UPS will pick up what DHL has left.
GM, Ford and Chrysler are in the same situation as FedEx, UPS and DHL, except they want more money in their pocket for greed. Chrysler will fold within 12-24 months and being absorbed into GM.
That left with FedEx and UPS to fight that out in the courier business and GM and Ford to fight in the auto sector.
The banking industry is the same. The Government decides which one they will save and the weaker ones to fold.
I am saddened America declines much faster than the British empire. If Obama can not reverse this within 18 months. America is finished ! Gone ! Done !
What will be next? We will be in Dark Age for a while.
What can Obama do ? Massive Government contract, work to be done by you and me not through companies and increase employment, spending and America can then be revivied again. By giving money to BIG THREE is a mistake, let GM and Chrysler die and millions people lose their jobs then America will wake up. Otherwise Detroit is just like the Detroit Lion goes 0-16 and never wake up !