+1. And it's not just price, its quality too. Even if you avoid processed junk and go after raw meats, veggies and fruit, you're still eating manufactured, as opposed to grown, sub-standard stuff.
My friends who come here to visit, after sharing their initial comments about the US, almost always compliment their overall very positive impression of the country with mandatory: "... but the food... sorry but it tastes like shit here, how can you eat this? Even Coca Cola is much worse, why is that?"