Jobs "Saved or Created"

Here is an illustration to show how those 640,000 jobs were really saved or created:

Let’s say you have a highway construction project in the Salt Lake City area that takes one month. A foreman is hired for the project and he brings on 20 guys he likes to work with to fill out his crew. That is 21 jobs “saved or created”. While that job is being completed, the funding if being secured for another highway construction project. By the time that funding goes through, the first project is done and they decide to just move the whole crew over to the next project. That is another 21 jobs “saved or created”.

If this happens four more times, on paper it looks like 124 jobs have been “saved or created” when in reality 21 people have been fully employed for six months. But if you judge jobs through a “man-weeks”/”job-years” lens, you have 10.5 jobs.