Based on your financial expertise, provide your response or viewpoint on the given financial question or topic. The response format is open.

Why don't banks print their own paper money / bank notes? 
Actually, banks do issue their own money, it's just not embodied as a piece of paper, it's called checkbook money and in the US, it's backed by 3$ per every 100$ promised, that's the magic of "fractional reserve banking."