In a post-scarcity society food/etc is very cheap and thus even poor people can afford sufficient food even if they don't work much (this is already true for developed countries).

Even a small amount of charity would provide anybody who can't work at all with sufficient food. Just like how today data storage in hard drives is dirt cheap; and we can provide billions of bytes of storage at nominal cost.

Looking at current society, starvation and mass famines have decreased greatly. Malnutrition is the next concern.

So, in some sense we may have reached post-scarcity for food for a large portion of human population. But there is still scarcity for quality and healthy food, such as fruits and vegetables.