Paper money does not fill your belly any more than gold does. "Money" has nothing to do with filling your belly, it has to do with a medium that everyone considers valuable. Everyone considers gold to be valuable, which is why it was used for thousands of years as money, and its value was based on weight. Whereas paper money is considered to be valuable by everyone based not on weight, for it is merely paper, but on a perceived value. There is a huge difference. And through that perceived imaginary value, those who issue it deliberately devalue it. This isn't difficult to understand.