There are a number of problems in the world somewhat related to our mission---illiterate people can't read a written encyclopedia in any language; people in countries with no internet access can't edit wikipedia; people in poverty don't have time to work on a wiki encyclopedia; people living under oppressive governments can't edit wikipedia freely; etc.
I certainly don't think we should try to solve all those. We can try to mitigate problems where it's not that hard to do so (e.g. by producing paper versions to distribute to non-internet-connected areas), but some of them---like solving the "digital divide" or world hunger, or overthrowing oppressive governments---are somewhat out of our areas of core competence.
Or by receiving money in order to do something about specific problems. :)
I don't think we can or should try to solve any of those problems. But we can help a little bit, at least with the stuff you mention in the first paragraph. I don't see any reason to mention world hunger, digital divide or similar general concepts in this discussion...