The collapse of that factory in Bangladesh highlights the cost people in third world countries pay for our cheap products. What can we do to prevent or reduce the hardships experienced by those who make the cheap clothing we buy?

Owners of clothing manufacturing factories frequently underpay their workers and use brutal intimidation to force them to work 13 hours or more per day 6 days a week under dangerous working conditions. This occurs not only in Bandladesh but also in some factories in Vietnam, Indonesia, Pakistan and other countries. Most of the products are made for major retailers in Western countries. What can you do to make sure this exploitation does not continue? Much of this work is outsourced from the USA or Canada to countries where wages are impossibly low and where there are few protections for workers and no opportunity for them to organize by joining unions. Violent gangs are used to control the workers and local governments are either corrupt or ineffectual.
As consumers in free countries do you feel an obligation to do something to prevent the exploitation of these human beings? What are you thinking you should do?