Related: "An estimated 14.0 percent of American households were food insecure at least some time during the year in 2014," http://www.ers.usda.gov/publications/err-economic-research-r...

I question the assumptions at the foundations of these experiments. What if the decision to eat a marshmallow when you have the chance is a good strategy for a large number of people? It's easy to imply that people just need a bit of grit and hard work to succeed in life, when maybe the conclusion we should draw is that poor people often have to live hand-to-mouth. Maybe if we want to increase future life success we should focus on improving the security of their environment instead of attempting to teach them to be grittier.

I don't really know. Maybe they controlled for those variables. IANAS (I am not a scientist).