It must occur to anyone who is a transcriber that a portion of their records may never be used. We have to do them all just in case. Once done that's it unless corrections needed. It would be more inefficient to have to keep going back to them. They probably would get more damaged if having to keep going into them. Also how long would you have to wait for the record? If you think a transcriber decided to put what records they thought necessary and one you needed was left out. How would you feel? I know it's slightly different to scanning pages on demand but things would take forever to go on line if keep going back to the original.