Defense Spending Has Declined While Entitlement Spending Has Increased
http://www.heritage.org/budgetchartbook/defense-entitlement-spending
graph at the link
US defense spending is 5% of GDP
Several other countries are spending more. The US either wants to continue to be a world power, or we will disarm unilaterally.
National Military Expenditure In The World - as % of National GDP
http://www.blatantworld.com/feature/the_world/military_expenditure_as_percentage_of_gdp.html
Plus all of the eco-crap and PC stuff they load into the Defense budget these days
Defense spending has not declined.