I often find articles like this one from Nicholas Kristof interesting, in support of sweatshops. The idea is this: people who work in sweatshops have the option to do so. They decide to work in sweatshops because it's better for them to do so. People in developing countries want to work in sweatshops, and when developed countries make sanctions try to prevent sweatshops from cropping up, they're actually unintentionally hurting the countries. Sweatshops pay better and have better work conditions than working in a field.
Of course, the reasoning no longer applies when people are coerced or forced into working in sweatshops, as is the case in some places.