Money is just a form of energy, and in a way the extent of your material wealth can be seen as the degree of power you theoretically have to manifest the higher qualities within material reality. And why else are you here?
I'm glad this false dichotomy between the spiritual and the material is beginning to go out of style. The more spiritual people accept the material world as okay, and the more materialistic people accept spirituality as okay, the more balanced everyone will be, individually and collectively. This is good.