My recent post on the question of food deserts and people's eating habits led me to a topic I haven't touched in a while: school lunches. I wrote about it a lot in 2009-'10, when Congress was working on its once-in-five-years reauthorization of lunch funding. Amid much hype in late 2010, President Obama signed a reauthorization bill that created new guidelines to encourage more fresh and healthy foods, but allocated an extra 6 cents a day per kid...