Besos got wealthy because he built a successful business which provides a ton of value to customers. Besos is the wealthiest person on earth because the benefits from a financial system designed to grow the wealth of already wealthy people exponentially.

You can make the argument that bezos and other "self made" entrepreneurs deserve their astronomical wealth, but many people in the top wealth tiers just had the privilege of being born wealthy, and of living in a system their class has the power to bias in their favour.