It’s all a matter of perspective. Take a look at this excerpt from Laura Francis (who volunteered for Esperanza International):

I began discussing with here the problem of materialism in my life and materialism in general in the United States. I told [my Dominican friend] that it was very common for us to have houses larger than we need and more vehicles than necessary etc. She then stopped me and told me that materialism was also a problem in the Dominican Republic. I thought, “How is materialism a problem here when there is no consistent electricity or running water among other difficulties?”. She then continued that she had several pairs of shoes but she only needed one pair while others have none. This was coming from a girl who only gets one major meal a day and doesn’t have hot water in her house.