Then I presume you only own things essential to sustaining your own survival, and give away every other cent you earn to aid others? Like this internet you are typing on...hope it's free from your local library. Because otherwise, why aren't you giving that money away to charities instead of buying a computer and subscribing to the internet with it? I really hope you don't own a TV and subscribe to cable/satellite...because that money could have gone to helping a single unemployed mother feed her children. That stereo you listen to in your car/home....that money could have went to a homeless man. Hell, why even have a car? You could just walk, ride a bike or take public transportation everywhere and given that money to your local foodbank. You don't need a car.
Why should someone who has the money spend it on the luxuries he wants. You do exactly the same, only on a smaller scale due to your similarly smaller disposable income.