Paper money created literal zombies. Mindless consumers, drawn to sounds of life, where they find it - they eat brains.

They grow in number when a living human is stripped down enough to become one of them. It's often a permanent change.

They are individually unimpressive and numerically intimidating.

They are to be avoided, and can be easily worked around with a serving mindset, and iron disciple on basic rules around them.

It's a zombie movie. Less and less metaphorical as M2 rises.