The rich are the people who made money. They know how to make money, so that is what they do, they make more money. The poor do not know how to make money, so they don't or else they would be rich.
The first part is true, but the second one is a bit off.
The "know" is never enough, you also need the "opportunity".
Maybe knowing how to spot an opportunity or create your own is the first thing you need to know?