Is it? Wealth is used as a proxy for virtue, and has been for a long time. "Nobility" has two meanings, after all. Why the same word, if not the same root sentiment? Unless one definition was originally meant sarcastically.

Is it?

  Then Jesus said to his disciples, “Truly I tell you, it is hard for someone who is rich to enter the kingdom of heaven.  [I]t is easier for a camel to go through the eye of a needle than for someone who is rich to enter the kingdom of God.”

Wait, what does nobility mean other than aristocracy?