Great attitude, Chris
Perhaps buying Fairtrade coffee means that the adults who grow the beans can send their children to school, rather than sell them into sex slavery?
So you can't be arsed paying a bit extra for Fairtrade coffee (actually, it's sometimes cheaper) so you justify it to yourself by saying "well, if I don't exploit these people, someone else will!" That's a good way to look at things - genocide, rape, paedophilia... all human nature, it's how the world turns, so that's fine by Chris! I'm alright Jack, so screw everyone else! I guess you won't have a problem if I murder your grandma to steal her food, after all, survival of the fittest, innit?
Some of us don't mind paying a fair price for what we buy, instead of always buying at the lowest price and feeding our greed without a thought for others. Sure, it's not fool-proof (Fairtrade guarantees a fair price for farmers, but what of their workers?) but it's better than nothing, which is your solution. It's not always easy or even possible in this post-Thatcher world, but to just wash your hands of it is disgraceful. Cameron and Thatcher would be proud of you.