You will probably have a rough go at finding songs on contigency workers. My stripes will show when I open my mouth on how an exploited group of working stiffs disguised as white-collar workers probably won't identify themselves as a group in need of developing their own voice. Their alienation in their home-based cubicles is in some ways more pronounced than migrant workers in the southwest in the 1930's.
There, I said it. That being said, I wish you luck. Its an idea thats time has arrived.
Brían