The NYC study on the incredible shrinking supermarket was disturbing even to someone who gets depressed walking west and looking north at the Holy behemoth about to invade her own neighborhood, which now has almost equal numbers of food shops and drugstores. But it occurred to me that two ailing industries could be healed with one merger. Just turn all the spaces rented by Wachovias, WaMus, Chases, North Forks and First Republics into something useful. Call them food banks.