Give me the Death Note, I can be trusted to act rationally. The only “undeserving” to end up on it would be people who step through Metro doors and immediately stop, even though there’s people behind them.
More seriously I know the author has said it’s about power corrupting, but if that’s the story he wanted to tell then he should’ve chosen a different protagonist. Its also a silly mantra, we do not live in a Tolkien novel, power isn’t some supernatural force.
Billionaires that muder others by polluting nature or lobbying against their rights or otherwise make the lives of many more precarious aren’t innocent. That’s what it’s getting at. But even if this was just “anti-rich”, if you’re rich you can literally give your money away. If you’re poor unless you get extremely lucky you’re essentially screwed.