[murm]

To me, it's his position that makes those words seem more credible. Once you hit the peak and have everything one could dream of you lose your illusions and realize that the craving still goes on and it's much more wise to just count your blessings. If you would hear those words coming from some poor pleb you would doubt that "They just don't know what they're talking about, how could they know? They're poor and don't have anything. Of course money and status and power is the answer?"

Also, I'm not sure if it was intended as advice to anyone other than himself. I was under the impression that Meditations was his private reflections towards the end of his life, not intended for publication.