Yes, most US citizens with a smart phone (they were poor right, smartphone?) and a few neurons could get to a level of a few $100/month doing jobs which are or almost are doable by computers now. Check the HITs on mturk currently; there are exactly these 2 categories; most of them are already doable (and very easy as well) by computers and the rest is too hard for someone who is not native English speaking or who is just not smart enough.
The way to imagine it is that all work that gets done in the world could be split up into pieces and coordinated by software. When there is a lot of this crowd-work to go around, prices will rise and crowd-workers will earn a reasonable income.
Much of enterprise software today is already this, the filling in forms and systemic procedures. However, it hasn't been intelligently designed to be distributed through the internet, instead having been mostly a transfer of pen and paper forms into a computer.
Another type of crowd-work is of the physical variety, what amazon, uber, task-rabbit do. There are complaints that these reduce wages, but I don't buy that. There is pent-up demand for things that currently don't get done. For example, I might hire someone to clean my house, but the current mechanisms are too much effort. If there was an uber-like button to press, I might do it every once in a while.
I could get carried away and talk about this for hours so I'll stop. But the essential point is to reorganize all work through web and mobile interfaces, have human -> computer -> human, instead of the inefficient human -> human system.