The United States has a system of taxation by confession. That a people so numerous, scattered and individualistic annually assesses itself with a tax liability, often in highly burdensome amounts, is a reassuring sign of the stability and vitality of our system of self-government. What surprised me in once trying to help administer these laws was not to discover examples of recalcitrance, fraud or self-serving mistakes in reporting, but to discover that such derelictions were so few.

Robert H. Jackson (1892-1954) US Supreme Court Justice (1941-54), lawyer, jurist, politician
United States v. Kahriger, 345 U.S. 36 (1953) [concurring]
    (Source)

This is often misattributed to Hugo Black, who wrote a dissent in the case.