Most people come up through the ranks and you can bet the CEO was one time an analyst with a demanding boss. After decades of work he made it to boss. You see this everywhere where you move up the ranks and things get better. That's the apprentice deal for all of history.
Part of his compensation is relative flexibility although I'm almost certain c suite often work a lot more and have higher demands than junior employees.
If you're very valuable to the firm (e.g. CEO) you can get away with more stuff. It's the natural order of things. I don't really see any other way around it apart from a dehumanizing process to treat everyone exactly the same regardless of capabilities