that is not money, that is barter, and it is a closer version to simply just sharing or giving
ask yourself "why do I give free things to my family and freiends but not to others who may need them?" the answer is humans are predominantly selfish and hoard so some go without
the whole world is my family, is the correct perception, every being and everything, so if I produced food I would just share it with everyone I could
That is money in some societies. Money is simply the most marketable (widely accepted) commodity. There have been many societies where a measure of grain was money.
Money often in the past was silver or gold because they were the most widely marketable commodities and would be accepted for trade across wide areas.
money is a coin or paper representation of goods or services, once it becomes food it is just barter or sharing
and if I have too much grain don't share it to people who need to eat then I am just a demon
there are still some sane communities that just all work to make food and share it all, along with making clothes and shelter for each other