>> box full of unsorted scraps of paper
Seems like an easy job for AI. Take all scraps of paper out of box, record a video of all scraps, AI make sense of the handwriting and other things. Eventually make a robo that allows you to dumb the scraps into an accounting box that does all of this automatically - fish out receipts, scan, OCR, understand meaning, do arithmetic, done.
Honestly, who would miss this kind of work?