One out of three American workers is now a freelancer. And some of them work in the "shadow economy," with no paper trail that the federal government can see. Why? They want to avoid taxes.
It could be the guy doing your bookkeeping or the woman designing new computer software for your firm.
Sara Horowitz founded the Freelancers Union, which now has more than 200,000 members across the U.S., all of whom report their incomes to the government and pay taxes and Social Security. But Horowitz says there's a lot of pressure to work off-the-books because freelancers often pay higher taxes than everyone else.