The easiest way to yield that kind of return is aborting on pre-committed spending. In fact, that's the way the poor generate this kind of income. If they have $100 for food this month and a sudden expense needs $50, then that means they just go hungry until their budget hits $50 for food this month.

What you do is you starve a day or two and sell your food bank food. Everyone is capable of generating income while depleting from stores.