1000 or 10k per stick figure is equally arbitrary.

What they actually need to do is scale the size of the stick people correctly.

For example, one meaningful measure might be to scale it so that one stick person fits inside a circle with area corresponding to the amount of money they have to earn in total for that number of people to cover all their living expenses and some amount of savings left over. I am sure some statistical bureau has some meaningful dollar amount of some sort that makes sense to use.

Just make it so that the companies that employ the most per market cap are filled, so we can see how empty the rest are.