I think programmers do in fact create some jobs. Programmers are really self-replicating entities. Think about it, every time you start a project you create a burden of maintenance. For yourself, which means you can't tackle as much work as you could before, work which will go the way of another programmer; or for the lucky dude who will end up maintaining your work. Of course, the project can end up abandonned, but in that case nothing is destroyed either.

The more we create complex systems, the more we need people to grease the cogs at all levels, people to oversee them, people which have non-local view (or even a global view, as far as it is possible) of the system, etc...