In light of Monday's post, I found this article from 2010 from the CBC News: Poor and Fat: the link between poverty and fat.
"Many of these factors are also linked to poverty, however. A 2009 study in Montreal, for example, demonstrated that low-income areas have less access to quality food than their high-income equivalents. The prevalence of fast-food restaurants has been shown in other studies to be greater in low-income neighbourhoods. As well, the cost of high-quality food is generally higher than the cost of pop, chips and other high calorie snacks.
Put simply, for those who are poor, it is easier and cheaper to buy junk than it is to buy real food for your kids. Vendors that sell quality food are harder to find and reach, and wise food choices take a bigger chunk of your annual income in the process."
I highly recommend the whole thing, and bookmark it for the next time someone wants to tell you that fresh food is cheaper than fast food (nevermind the time it takes to prep and serve) and so everybody should just stop eating junk already.