Two questions. First, can you provide proof for the efficacy of your methods? What have you been able to do (in a tangible sense; how much money/time have you saved) that wouldn't be possible without this method? Even one of the writers of the Agile Manifesto badmouthed his own work a little while back because he realized something was wrong (https://news.ycombinator.com/item?id=9538858).
Second, I don't like the idea of hiring people as independent contractors instead of employees. They lose many benefits and end up giving you most of the control.