You are assuming the cost doubling is just the labor portion. I'm pretty sure they are saying the entire cost including labor, will MORE than double, because, in the US, you can't work people for less than $17 per day, as is reported the case with Foxconn assembly workers. Add to that, the extensive research that points to a lack of available workforce in the US capable of working these jobs, and you have lost of financial problems. iPads reportedly take over 300 people and 5+ days to assemble, test and prepare for your use, each.