Quality assurance only as good as it helps to timely identify the problems and to imrove the manufacturing process. If its sole purpose is to find defective product out of the whole lot leaving production - it is just a waste of resources.
And I do believe that majority of workers want to do a good job. Unless they are demotivated or some kind of substance abusers. So they need just help and support, not kind of another guy checking whatever they have done.
And I do believe that majority of workers want to do a good job. Unless they are demotivated or some kind of substance abusers. So they need just help and support, not kind of another guy checking whatever they have done.