The dangerous spike you see from the 1940's is from the Great Depression. Although the debt we are experiencing today isn't as high, it has some similarities.
The debt from the 1940's was money spent for WWII towards manufacturing jobs. Although we accrued huge debt, the explosion of jobs helped pull the US out of the depression.
We are experiencing huge debt again in 2010, but its a necessary debt in order to survive the recession. How quickly we recover from this recession is dependent on how that government money is spent.
You suggest that a lot of that money results into jobs sent overseas. To me that is an argument that cannot be proven so I'm not going to get into that. What I will say is that if its unskilled labor, jobs will always go overseas no matter what. Unskilled labor is cheap labor and its cheaper overseas.