From The Columbian:
Wal-Mart and Amazon offer low prices that allow us to stretch our tight budgets. But our gain comes at a price to the community. Even in the low-paying retail sector, Wal-Mart stands out for its low wages. One study by David Neumark, an economist at the University of California, Irvine, says that Wal-Mart's presence in a community has the effect of driving down all wages in that community.

For the full story, please visit http://www.columbian.com/news/2014/feb/23/high-price-of-low-cost-products/.