Agree with the background and drug policies. If management and trainee are both committed, then anyone can be taught the skills to perform the task hired for. But as the quote Barney added, they say they don't have the time to get them up to speed. I've been in a position to do such training with the first Japanese automaker to set up shop in this country, and have been very successful.
The manufacturer is the one to blame quality issues on. One poster mentioned touring a factory and seeing these guys running around constantly - think of them doing that for 8 + hours a day - what level of quality is present after a few hours on the job? Think of the guy who won't make incentive pay if he correctly uses a hole saw instead of a hammer to make a hole. That's not his fault - he's trying to do an above board job to support himself and family.
Reminds me of a Jetsons cartoon where a guy is trying to fit a square peg into a round hole during basic training test for the space corps. It doesn't fit so he takes a big sledge hammer and smashes it in, obliterating the test in the process. Then some robot zips up and says shows initiative, and promotes the guy to a General.