Here’s a cheerful thought on this sunshiny Tax Day. According to the website usgovernmentrevenue.com, the governments (plural) of the United States will collect $6 trillion in revenue in 2015—$3.2 trillion for the federal government, $1.6 trillion for state governments, and $1.2 trillion for local governments. Those taxes will include income tax, social security tax, sales tax, along with fees and charges and other revenue. For a total of $6 trillion. Do you know how much that is? Neither do I.