In order to help significantly more we would have to raise taxes or cut programs of some kind. It's too bad, but the American people aren't real big on charity toward other parts of the world, so it's doubtful that we'd approve of a tax hike to fund disaster relief. Cutting any kind of programs is not an option either. That said, the US will (in the end) contribute well over $1 billion to disaster relief in South Asia, and we're sending MEUs and a carrier task force to aid in recovery and reconstruction. We ARE doing a lot. Sure we could do more...we always could, and I don't think it would matter how much we did, we'd still get criticized from some UN pussy who thinks we're not doing enough.
That's probably true, yet considering we spent over 100 billion in Iraq, and we are only spending 1% of that in this case, we should be able to do more, especially directly through the government.
My point is, if we are the sole remaining superpower and have the responsibility to save the world from terror, don't we have the same responsibilty in this case?