The "stimulus" destroyed jobs, as all government spending does, and it made the economy worse.
Further, it is deficit spending that is killing us, as we are incurring unprecedented deficits.
Finally, borrowing is already becomming a problem with indications that the FED is printing money to participate in the auctions (using a major bank of convenience, of course) in order to keep auction rates low... this means that the treasury auctions have already started to fail. Further, the auctions for the last 2 years have shown a sharp shift towards shorter term notes, which means the amount that has to be rolled over at each auction is snowballing.