This is somewhat misleading. First, you provide no source for your data. Second, it appears SS is lumped in with Pensions, a gross mischaracterization of SS expense. Third, it seems you are talking about mandatory spending, and leave discretionary spending entirely out of it. Using two other sources, FRED and USGOVT spending, a much different picture emerges. So perhaps you have oversimplified, and in doing so, mislead?