I agree with your interpretations.
I thought maybe the Warren Buffett one might include the idea of diversification, like not putting all your money in one stock, bond, or cd or whatever else there are.
My fave was "It is not wealth one asks for, but just enough to preserve one's dignity, to work unhampered, to be generous, frank and independent." - W. Somerset Maugham
That was you'd avoid the problems that the others imply, especially Steve Martin's.
Enjoyed the article, Sandra!