Many people and entities play a role in food waste (e.g., manufacturers, retailers, restaurants, etc.) who is most responsible and why?

Should those people and entities be required to take more steps to reduce food waste? If so, should it be a legal/criminal issue or should it be enforced in some other manner?

Consider the ethical issue related to food waste, hunger and poverty the environmental impact of growing/ raising/processing and wasting food. What do these problems add to the conversation?