OK, we will simplify this for you using an analogy. An anaolg is a similarity between like features of two things, on which a comparison may be based.
You are told the US is shifting from analog TV signals to digital TV signals and your old analog TV set will no longer work as it is. You decide to buy a new TV, so you buy one which has a digital tuner in it. You plug it in, turn it on, and find out every show has a green tint to it. Further research shows it simply cannot show less green...though that was not the intention of the manufacturer.
According to you, the TV still work, just not as well as intended. To the rest of us, it is a piece of junk that needs to be returned to the store...it fails miserably at what it was intended to do.
The stimulous package did not do as you Obama claimed...therefor it failed. It was not simply as "did not work as well as intended", it did not work period. The claim was to keep unemployment at the line drawn, and it failed miserably...not even close to that line. It was a failure.
No kidding. Why on Earth would anyone want to buy another one of those TVs which do not work? That would be stupid.
"Oh, 3/4 of a BILLION dollars failed to work properly...lets throw another 1/2 a BILLION dollars at it, maybe it will work THIS time." Durrrr....