I've felt the same way. I might not be as tempted to purchase if I weren't here a lot, but I really enjoy the sense of camaraderie and the connections I have here. So I figure I'll just need to learn to keep my budget in check on my own.
My response to that is always to say that all hobbies are in essence superficial wastes of time and money. People (myself included) play sports and video games, follow sports, collect stamps and coins and models, learn to cook really well, follow music, go to the gym... All of those things are strictly speaking unnecessary, but if you don't have things that you enjoy and that make you feel better about life, then what the heck are you doing?
No one is saying that makeup is more important than family or great friendships or scientific and medical advances or art, but it really annoys me when people deride a love of beauty as inconsequential. I hate to say it, but I feel like it's a sexist hold-over. Things that interest women- beauty, fashion, decor, etc. are dismissed as trivial. As you can tell, I've thought about this... probably too much.
I love this place. That is all.