Harlan F. Stone,
Graves v. New York ex rel. O'Keefe…
“ So far as the implication rests upon the purpose to avoid interference with the functions of the taxed government or the imposition upon it of the economic burden of the tax, it is plain that there is no basis for implying a purpose of Congress to exempt the federal government or its agencies from tax burdens which are unsubstantial or which courts are unable to discern. Silence of Congress implies immunity no more than does the silence of the Constitution. ”
