Is the U.S. government spending enough money on climate research?

An excerpt from an interview with Ralph Keeling:

One part that my father worked on, that has become a community of scientists, is still a very small community. Things that should be important tend to be overlooked. We're under threat from a kind of apathy and, in my view, an inappropriate apathy. We feel the continuing challenge of having to justify what we do. It was my father's challenge when he was alive and it continues today. I hope that government and private funding should be brought to bear on this to put it in to more stable footing.

From this page (dated Feb. '07):

President Bush committed the United States to continued leadership on the issue and since 2001 has dedicated nearly $29 billion to advance climate-related science, technology, international assistance, and incentive programs. This is far more than any other nation. Since 2002, the Administration has spent more than $9 billion of this amount on climate change research and, under his direction, agencies developed a 10-year strategic research plan for climate science that was endorsed by the National Academy of Sciences. Further, federally funded scientists have conducted an abundance of research, published their findings in peer reviewed papers and journals and talked with colleagues, policymakers, and media around the world about their findings.

If the science is actually settled, why are we continuing to spend so much money on climate change research?