George Sutherland, Heiner v. Donnan — Opinion of the Court
“ The purpose here being admittedly to impose a tax on a privilege-that of making gifts inter vivos-to the extent that its exercise substantially impairs the operation of the tax on estates, it was for Congress to say how far that impairment extends and how far it is necessary to go in the taxation of gifts either to prevent or to compensate for it. Unless the line it draws is so wide of the mark as palpably to have no relation to the end sought, it is not for the judicial power to reject it and substitute another, or to say that no line may be drawn. ”
