Economics 21 had an interesting graph in their article titled “How to Fix the $960 Billion Budget Deficit”.
Here is how federal government spending will be broken up the next ten years.
Almost two-thirds of additional spending will be driven by entitlements, primarily Social Security, Medicaid, and Medicare. America’s aging population is the primary contributor to the growth of Social Security and Medicare, while the Affordable Care Act substantially expanded the scope of Medicaid.
Adding interest payments to the budget brings the total increase in the debt from mandatory spending to 85 percent. Spending is projected to grow by $2.3 trillion annually by 2024.