those poor people depend on having a useful currency to trade for tools to make more food. If you crash the economy the little piece of paper we trade around right now will become worthless and we will be back to bartering until someone prints new paper or mints a new specie to use.
You are too ingrained with a monetary system you cant even imagine a system in which one doesn’t exist. The miner doesn’t need a currency when his food and tools are provided for. The metallurgist doesn’t need to sell tools when they can give away the excess. The farmer doesn’t need to sell his food when he can give away the excess. We don’t need constant accumulation to distribute resources in an efficient manner. Especially when the only reason these excess products weren’t given away in the first place is profit motive. Not to mention most of the labor intensive work could be outsourced to robotics where we not hoarding the physical resources for profit and war time motives, making them overtly expensive.
We live in a time where automation and robotics could allow us much more freedom and dignity however we have allowed those at the top too use that efficiency to hoard profits and resources as power management tools instead of utilizing these resources for growth and equity across our species.