Subversive shopping

How can the simplicity of Jesus Prayer Spirituality be reflected in our lifestyle? I was thinking about a concept of 'subversive spending'; our consumer advertising promotes the expectation that we'll buy top of the range products and spend more than we 'need'. How about if when we shop, we buy the simpler, 'adequate' product, and always donate the difference between the cost of that and the higher end product to those in need? Andrew