It does occur at the consumer level, but part of the reason so much food waste occurs at the consumer level is the way the industry operates, which has led to changes, for instance, in how Tesco operates. It does not do as many of what you now know as the BOGOF, buy one, get one free. It's buy one, get one later, because Tesco has realized—and, of course, they're one of the world's largest retailers—that getting consumers to buy a lot of food in bulk actually exacerbates the food waste issue at home.
On May 26th, 2014. See this statement in context.