Japan, England, Europe, America, and other places all have extremely serious debt problems - both in the private and public sectors. We have already seen coordinated activity between the Fed Res and the ECB in doing very large swaps. If one central bank does a big QE then their currency falls and makes their exports more competitive. Also, money will tend to flee to what are perceived as safe havens. This results in strange distortions in the capital markets. If a number of central banks act together it could serve to mitigate some of the negative effects. So, I agree with CM. I think there will be a coordinated effort. I also believe that it will only work for a short period of time. It will be inflationary. It is a pretty good bet that wages will not rise as fast as commodities in that environment. Asset buying programs will just move more questionable debt from the private sector to the public sector. The central banks already have huge balance sheets. We are not having a liquidity problem - we have an insolvency problem. However, the central banks are not going to just start giving money away. They only loan money. You can't make any money giving money away. There are two other aspects the central banks need to keep in mind:
1) If a person owes the bank 100 dollars and anything goes wrong the person is in trouble. If a person owes a bank 100,000,000 dollars and something goes wrong the bank is in trouble.
2) Until governments all over the world get spending in line with revenue there will be no end to the debt problems. All the QE in the world will not fix it. Raising taxes will not fix it. Only cutting spending can fix it. I have never seen a government cut spending as the result of a tax increase.
There is no way to "fix" the collapse of a credit bubble other than write down the debts, reorganize, and get on with rebuilding the society. If that is done, somebody is going to get the haircut of a lifetime. The rich people and companies are not interested in taking the haircut for loaning money out on high risk ventures and then taking a bath when the risk catches up with them. It is much better to push those losses off to the public sector and stay rich. That is what has been going on for the last 5 years. That is also unsustainable. We are actually coming to a cross roads. There is going to be a very serious financial emergency. The government, who has caused the financial emergency, will make every effort to retain power. They will clamp down something furious on the people. The class of dependency will rebel when their transfer payments are cut or disappear and the military will be deployed to control them. Capital controls will be instituted. The government may will confiscate private property (retirement accounts, bank accounts, land, gold, guns, etc.). Another segment of the population will disagree with the government clamp down because it is against the constitution. They will begin to work behind the scenes to change the government. You can assume the government will not be happy with that. There will be a lot of trouble.
But, the central banks will just have to give it one last try. They will not give up and take the haircut or be nationalized without one more last big printing hur-ahh. When that starts you will know the jig is up and you will need to start focusing on preperations for dealing with the financial emergency that will come afterwards.

I just listened to Chris' Martenson's recent interview on Financial Sense, and he again predicted with a degree of *certainty* (not the right word, but it's late here), that the US Fed, BofE, BofJ, ESB etc would all eventually announce a vast, concerted round of money-printing. He put a rough figure of $5 Trillion on it and said this is the moment when he will go "all in" and get out of paper money.
I am baffled by his confidence in this prediction. It seems to me, there are many possible pitfalls that could prevent this (competitive devaluations and currency wars, different crisis-levels in diff. countries, extremists taking power, to name but few).
I would like to know more about the reasoning behind it, and what time frame might be put upon it.