It is difficult for most of us to maintain a sense of all the elements of the federal budget. We spent about $3.5 trillion in the last fiscal year. That's a difficult amount to get one's head around.
According to the Friends Committee on National Legislation, we spent $1.2 trillion in the last 10 years in Iraq and Afghanistan. According to Wikipedia, in 2011, we spent $725 billion on Social Security and $740 billion on the Defense Department. However, defense spending does not include another $10 billion or so spent by the Department of Energy on maintaining our nuclear arsenal, $48 billion for Homeland Security or $141 billion in Veterans Affairs expenditures, chiefly the cost of caring for our wounded soldiers, bringing the total to $949 billion. Interest on our debt totaled about a quarter of a trillion dollars. The dollars do add up.
Slate conducted a poll  on measures to reduce the deficit and pay down the debt. It is a useful exercise to help us think through these issues. However, I could not successfully reduce the budget within Slate's limits. I would have doubled the defense cuts instead of accepting some of Slate's options. Actually, my preferred cuts would be a lot deeper than that. That's why the Slate poll is useful. It helps us grasp what we are all hearing and trying to talk about.