Comment by tmoertel

> Historically, what makes people with capital able to turn things into more capital is its ability to buy someone's time and labor.

You forgot to include resources:

What makes people with capital able to turn things into more capital is their ability to buy labor and resources. If people with more capital can generate capital faster than people with less capital, then (unless they are constrained, for example, by law or conscious) the people with the most capital will eventually own effectively all scarce resources, such as land. And that's likely to be a problem for everyone else.