The biggest share of federal spending is mandatory expenditures on social security, health insurance and the like, which are prescribed by laws and not subject to the vagaries of the annual budget-setting process.

联邦支出的最大部分是社会保障、医疗保险等方面的强制性支出，这些支出由法律规定，不受年度预算制定过程的变化影响。