From CNN:
"In general prices go up, people buy a little less and therefore firms use a little less labor," said David Neumark of the Center for Economics & Public Policy at the University of California, Irvine. "You are better off if you earn a higher wage, clearly, but weigh that with the likelihood that your employer is going to make due with fewer workers and you might be one of those workers."

Original link to CNN unavailable. Instead see http://www.live5news.com/story/24194290/low-income-workers-caught-in-mid....