This guy has spent years creating a graphical representation of where our discretionary spending goes to. As you might expect, an appalling amount of it funds the military, but even I was surprised by how much, comparatively, that appalling amount really adds up to And remember: Social Security and Medicare are not funded out of income taxes, but out of payroll taxes, so they're not included in the chart. I think it's a bit of a dodge to say Congress lacks authority over them, so watch out for that. Nevertheless, it's a mightily impressive piece of work, and you can see a large version here.