This will probably result in very few jobs. The number will decline as the technology gets better, too. The USPS's first machine sorting system had tens of thousands of people keying in the ZIP codes as envelopes went by. Then that was automated for machine-addressed mail with specific fonts. Then for all typed and printed ZIP codes. Then for all typed and printed full addresses. Then for clearer handwritten addresses. Now there's just one national center where a few people look at images of illegible addresses.[1]
[1] https://www.nytimes.com/2013/05/04/us/where-mail-with-illegi...