Assume picking up a penny takes one second. There are 31536000 seconds in a year (roughly, let's not get into leap seconds). Multiply that by $.01, the value of a penny. Then you get the salary such that across the year you're making a penny every second. A caveat to this is that even if you're making more than this you need to debate what "worth your time" means because it's still a penny you wouldn't have either way, but I think this is enough to illustrate the wealth gap.

Small edit: To add to that last point, what I mean is that it's not like you stop earning your yearly salary while you're picking up a penny.