GUEST, wealth is a purely artificial concept adopted to make it possible for goods or services to be exchanged. Whatever a society agrees about wealth is as valid as the basic concept itself. Further, the concept of resources as a finite "pie," such that one can only increase one's share by depriving another, has been almost universally discarded in favor of cooperative economic theory.

By the way, who is "they" that chose opportunity, and in what sense? Pronouns only work once a noun has been identified.