The concept of "free stuff" is also rather artificial: it comes from the idea that we MUST pay for things.

Imagine we build self-sustained machines capable of producing and distributing enough food for twice the Earth's population. Does it still make sense for people to have to PAY for their food?

As a reminder, many of our ancestors gathered fruits that grew on trees or hunted animals -- they did not need to PAY anyone for food.

The idea of paying for food makes sense in a world where food is scarce and great effort is required to produce it. As the difficulty in producing in volume decreases, so should this artificial price we put on it.

We still don't have such food-producing machines. But that's a direction in which we're going, and we should shape our society with this kind of thing in mind.