Overview Several government agencies provide budget and debt data and analysis. These include the Government Accountability Office (GAO), the Congressional Budget Office, the Office of Management and Budget (OMB), and the U.S. Treasury Department. These agencies have reported that the federal government is facing a series of critical long-term financing challenges. This is because expenditures related to entitlement programs such as Social Security, Medicare, and Medicaid are growing considerably faster than the economy overall, as the population grows older. These agencies have indicated that under current law, sometime between 2030 and 2040, mandatory spending (primarily Social Security, Medicare, Medicaid, and interest on the national debt) will exceed tax revenue. In other words, all discretionary spending (e.g., defense, homeland security, law enforcement, education, etc.) will require borrowing and related deficit spending. These agencies have used such language as "unsustai...