You're basically describing ODesk, Elance, Mechanical Turk, etc... Not saying this execution will/won't work, but there are lots of firms that seemed to have make it work to solve a similar / the same problem set.
That's just it, I wouldn't. This seems only useful for people who are maybe just too busy to do it them selves and have enough disposable income that paying a couple extra bucks to the guy handling your business isn't a big deal.
Creating additional demand for low-level jobs is a bad thing, because no one really wants to do them. People just do them for the money. The goal should be to eliminate the need for people to do this, not to create even more of those jobs.
Not in Canada. I work in telecommunications and technical support starts at $17/h. Sales starts at $12/h I think plus commission. Lots of sales reps in our call centres are easily clearing $50k a year. Everyone gets full extended health benefits. Minimum wage is around $10.25 I think?
My idea is nothing like a call center. Each worker is their own boss. They decide when to work, and how hard they will work. The revenue they earn would be directly related to their effort, and not an hourly wage.