Buddy, Can You Spare a Dime?

President Obama proposes to spend $480,000,000,000 to create jobs and to stimulate the US economy.
This is the classic Keynesian strategy which failed spectacularly in the UK in the early Seventies. Obviously, it will increase America's already massive debt.
But how did the US come to be in this depressed state in the first place?
I suspect a major factor is the way the West has been exporting jobs to low-wage economies over the last twenty years. It has created a powerful economy in places like China while leaving millions without work in the lands where the jobs originated. We need only look at the computer sector, in which  US know-how has created a new industrial revolution. Yet not a single computer is manufactured in the United States.
So why is no-one pointing the finger of blame? Why the silence?
I suspect because this is one of those occasions when both Right- and Left-wing politicians are muzzled by their respective ideologies. For the Right, the export of jobs is in line with libertarian economic theory:the move makes goods cheaper in the home country, while creating wealth in the poorer countries. Any unemployment caused will be temporary, until the market pulls workers into new jobs. Meanwhile, of course, welfare softens the impact.
Why is the left so silent? Because the only obvious alternative is some form of nationalism, with controls over imports and exports. And the left do not like nationalism (or for that matter nations).
So America, at least in the short term, will continue to subsidise non-jobs, while exporting real ones.
Something's gotta give.