It is important to be aware of your place in society. I am a 28 year old white male with only a handful of years of professional experience. I am benefiting from the past and present exploitation of others. But within this privileged class I am not so high up on the totem pole.
By working my way up the totem pole, and always looking for ways to help, I will find myself in a position to make a real impact. And if not myself, then hopefully my children.
It makes sense to enjoy your prosperity to the extent that it allows you to continue progressing toward this goal. In order to climb the totem pole, you have to spend money on luxuries. You have to wear expensive suits and go to exclusive parties.
At the same time, there are always things you can do to help right now. For example, I tip service workers well as they need the money more than I do. I give change to beggars and those who find themselves in tough spots. I also make an effort to spread the perspectives of those less privileged than myself as I've found that straight white males pay more attention to other straight white males.