Don't forget: police protection, fire protection, military protection, paved roads, functioning traffic signals and signs, groomed parks, trash collection (some places), up to sixteen years of education, enforcement of workplace safety standards, financial protection if you become suddenly disabled, a legal system in which to resolve disputes.
Those services make up a fairly small portion of government spending. The really vital portions [1] are even smaller.
Most government spending is merely wealth redistribution.
http://www.usgovernmentspending.com/piechart_2011_US_total
[1] Vital: protecting the US from Russian invasion. Non-vital: drone strikes on random Pakistanis. Vital: protection from bandits. Non-vital: war on drug users.