Earlier quoted context omitted.
Good luck with that. The IRS has very specific rules for who can be considered an employee and who can be considered a contractor. Attempting to treat people who should be employees as contractors is one of their number one enforcement goals, because contractors don't have withholding and are therefore far less likely to pay their taxes.
Would that matter, as long as the contractors only work one of projects which are time limited?
PDF warning: [1] http://www.irs.gov/pub/irs-utl/x-26-07.pdf see pages 3-5