Free software can help with that. In my past two jobs, I've worked with a business platform which we adapt for our clients by developing custom modules, and there's a decent community of small companies from over the world which sell mostly to their internal markets but share modules under Free licenses.
Of course, nobody is getting rich from this, but there are many of us making a very decent living.
It's not about that. It's about choosing not to use an existing, appropriate solution because it is not being developed and run locally. There can be valid regulatory or security reasons to choose that, I'm only considering the "keeping money local" argument.
Of course, nobody is getting rich from this, but there are many of us making a very decent living.