"a very comfortable life"

Uh-huh. And is that equivalent to being happy? Secure? Loving? Loved? Inspired? Self-aware? Fulfilled?

Nope. It isn't. It is equivalent to the life of a dog in a large and comfy pen who is happy because he's getting lots to eat every day and he has a nice bed to lie on, while other dogs starve.

The dog simply doesn't know any better. We humans don't have that excuse. We know better. Or we ought to...

The dictator you have described must be a very insecure and lonely person...a miserable person at some deeper level...or he would never have sought the position OF BEING a dictator over other people in the first place. Such seeking for power is what people do when they perceive themselves as weak, vulnerable, and thoroughly lacking in love. They live in fear. They opt for far lesser goals than living by love, and that is their tragedy. Their lives are a loud and empty bell ringing in a meaningless void.

I don't care how well they sleep at night. A totally unaware person can sleep through just about anything, because he was never awake in the first place.