By pursuing the path of devaluation, the administration is invoking the mind-numbing logic of solving debt problems by issuing more debt.

With the government taking on more than one trillion(that is one million million) dollars of liabilities in this crisis, it appears that the government does not intend to let debt destruction take its natural course. With the bailouts, debt in the system is preserved, not destroyed.
A weakening dollar does make sense. First, it allows both domestic and export industries to become more competitive with foreign-made goods. Second, perhaps just as important, the government can slowly inflate away its debt.
However, one interesting point to take note is to ask yourself how long can the US keep up inflation to wipe away its debt. Who has the most to lose from the US inflation? A breakdown of the debt holdings might shed light on this issue.

It is one thing if “America owes her debt to herself”. However, recent times have proved that America increasingly relies on foreign countries to lend her money. An increasing amount of US debt is being held by foreign powers.

Together, China, Japan and Oil Exporters made up more than half of total foreign ownership. With so much debt being held by foreign powers, the US seems to be nervously whistling past a huge potential landmine by inflating away its debt. Will foreign debt holders really let the US dollar slide with nary a complain? Already, the rumblings of dissatisfaction from China is becoming louder. (By the way, OPEC has, through past history, shown itself to be quite capable of drastic action if their demands are not met eg. oil embargo).
Turning to other issues, one side effect of the weakening dollar and low interest rates is that it becomes relatively cheap to borrow US dollars and invest them elsewhere is risky, higher-yielding assets. This is termed as a carry trade, and it pushes asset/commodity prices higher, as long as the dollar remains weak and interest rate remains low. According to Nouriel Roubini, this is now helping to fuel another asset bubble. To quote him,
“We have the mother of all carry trades…Everybody’s playing the same game and this game is becoming dangerous.”
Once the dollar stabilizes and interest rates rise, it no longer becomes profitable to borrow in US dollars. To cover their short positions, there will be a massive flow of money back into the US, which might spark off another large decline in asset prices. With equities worldwide soaring, it might be good to ask yourself if the economic fundamentals are there before investing. Once the liquidity is drained away, can share prices remain at their current level?
How long can the weak dollar persist? While everything seems fine and dandy now with share prices rocketing, closer examination reveals plenty of hidden risks and uncertainty about the future. While the Fed has kept interest rates low in order to spur business, much of the easy credit seems to have been directed into asset/commodities market, fueling another asset bubble, instead of into the real economy and creating new jobs.
When a government owes a lot of debt, how it decides to pay off its debt is equivalent to how the debt burden is shared. Through deflation, the debt burden is shifted to the taxpayer. Unemployment will be higher, credit is tightened, and the economy will contract. Through inflation, the debt burden is shifted to the savers, where the real value of their savings will plunge in step with the declining dollar. Sad to say, history has shown that typically, the government will choose the path of inflation. While deflation might bring about a swifter and stronger economic recovery, the future is never certain and there is no guarantee the economy will rebound. Meanwhile, the pain is certain to be a lot sharper (Eg. Britain after World War I). Inflation, on the other hand, as long as it is not too drastic, typically reduces the pain of restructuring the economy. Of course, the trade-off is that the pain will persist for much longer as inefficiencies are slowly worked out of the system. As for the savers, about all they can do is to blame their luck and hop around in impotent fury. Life is unfair after all.
结论呢?就是我们一起去吃大便吧。