The GAO warning us of financial disaster

The GAO isn't exactly a radical organization. They are one of the few parts of government that I tend to trust, because their entire job is to keep an eye on the rest of government.
They recently wrote this, with my emphasis in red:

The economic recession and the federal government’s unprecedented actions intended to stabilize the financial markets and to promote economic recovery have significantly affected the federal government’s financial condition. The resulting substantial investments and increases in liabilities, net operating cost, the unified budget deficit, and debt held by the public are reported in the U.S. government’s consolidated financial statements for fiscal year 2009. Because the valuation of these assets and liabilities is based on assumptions and estimates that are inherently subject to substantial uncertainty arising from the uniqueness of certain transactions and the likelihood of future changes in general economic, regulatory, and market conditions, actual results may be materially different from the reported amounts. Further, the ultimate cost of these actions and their impact on the federal government’s financial condition will not be known for some time.
More significantly, the federal government faces long-term challenges resulting from
large and growing structural deficits that are driven primarily by rising health care costs and known demographic trends. This unsustainable path must be addressed soon by policymakers. The longer actions are delayed, the more difficult adjustments are likely to become.

Its really important that we listen to what they are saying. This is the treasury department sending up a flare. Please don't ignore it.