Advances in technology increase productivity. Think of CAD with architects, and excel with accountants. Now, as an architect, you can avoid hiring many draftsmen because now one draftsman can do the work of many manual drafters. The same with accountants. This means that less people in the economy are needed to work that particular job, ceteris paribus.
These advances in technology mean that one man can produce more per hour than before, he will also be able to earn more. Or he could choose to produce the same by working less, and enjoying more free time.
If he loses his job to a higher tech worker, then he has several choices:
- Get training to become technologically up to date
- Go into another sector of the economy by finding another job
- Become a Luddite!