They claim and preach that this entire planet as is isn't worth saving. They also expect people to dedicate their entire lives to their purpose. Those things can give you a clue on their stance of helping others outside themselves.
That position about other affairs outside their organization is one of the things that i criticize the most. I'm not very fond of organized religion, but at least you can see things like Catholic Charities, schools and many other non-profit, community based organizations that come directly from religious organizations. The WT is very arrogant, greedy and self-centered when it comes to charity work.