http://en.wikipedia.org/wiki/Food_desert#Barriers_and_propos...
http://en.wikipedia.org/wiki/Food_desert#Barriers_and_propos...
http://theincidentaleconomist.com/wordpress/giving-people-ac...
(There are lots of natural experiments too - e.g., Jersey City, where I used to live, had lots of fat poor people and lots of svelte yuppies. Strangely, the poor didn't start eating Kale when the yuppies moved in.)
Assigning the label "victim blaming" to an idea does not prove it wrong.
http://www.bls.gov/news.release/atus.nr0.htm
http://www.bls.gov/news.release/atus.t11.htm
This data can answer the question "are poor people busy in general". (The answer is no.) But it can't answer the question "are poor obese people busy", since it doesn't allow you to slice by both busyness and obesity jointly.