Another perspective: Netflix is notoriously interested in only hiring top talent. Top talent is ambitious and always seeking to advance. I don't think it's a matter of envy, it's the unending beat of progress.
And,or: they hire the people most likely to feel unfairly paid, and it’s when we feel we are unfairly paid we are more motivated to negotiate higher salaries, and the more a company’s employees ask for higher salaries the more likely they are paid higher. And if the root cause of the feeling of being unfairly paid isn’t the absolute amount of money being received, then the higher salaries won’t reduce the feeling.