Dude. Listen to yourself. "Encourage a wide diversity of food sources". To the poor? The POOR. You seem to be missing that valuable piece of information. These people are not like you and me. They exist at a poverty level you have never laid eyes upon, unless you've done humanitarian work overseas. Then maybe you do understand and I'm sorry for being frank. But you sound like some sort of couch-surfing ignorant american who thinks a poor person is someone who only has a 30" TV and not the 60" model.
These people don't get 'choice' in the food sources. They buy what they can afford, which isn't much, and usually ends up being rice because you can buy enough of that to feed your family on the ten cents a day you manage to make selling trash you picked out of the landfill you live in. I wish I was kidding about that, too.
That's why this is such a breakthrough. Why this is necessary. I wish it was as easy as encouraging them to eat more cucumbers or whatever but it's not. You have to provide them with a food source that contains what they need but is also cheaper or as cheap as existing staple foods. I think we can all agree 'organic' food is not cheaper. Your plan may be ideal, but it is not a viable option.