I'm sure we all have our own opinions about this. :-)
But mine is that W really doesn't trust the UN (as he shouldn't), and ol' Billy was off in London mouthing off about how the US wasn't doing enough.
So the "dummy" got billy to agree to raise money for charities (notice that this money isn't going through the UN. It's going to places like the Red Cross, CARE, and religious charities working in the area).
That keeps the money out of the UN and shuts ol' Billy up. And it also gets much needed relief to the people who need it.
Amen!
It also has the look of bi-partizanism without the damage.