If you consider it in absolute values it makes sense. Bezos could give me a billion dollars which would match my wealth with Pichai's, and he'd still have 199 billion dollars

Yes, if you have a billion dollars then in terms of wealth Pichai is closer to you than to Bezos. But if you’re a typical HN reader (level 4 or 5), the difference between you and Pichai is pretty much infinite, while Pichai and Bezos are almost the same (relative to you): both are ultra rich.