In McCulloch on "Taxation," for fifty years the standard treatise in England on the subject, the following language is used: "It is argued that, in order fairly to proportion the tax to the ability of the contributors, such a graduated scale of duty should be adopted as should press lightly on the smaller class of properties and incomes, and increase according as they become larger and more able to bear taxation. We take leave, however, to protest against this proposal, which is not more seductive than it is unjust and dangerous.... If it either pass entirely over some classes, or press on some less heavily than on others, it is unjustly imposed. Government, in such a case, has plainly stepped out of its proper province, and has assessed the tax, not for the legitimate purpose of appropriating a certain proportion of the revenues of its subjects to the public exigencies, but that it might at the same time regulate the incomes of the contributors; that is, that it might depress one class and elevate another. The toleration of such a principle would necessarily lead to every species of abuse." The well-known French political economist and scientist Leroy-Beaulieu in his works, _Traité d'Economie Politique_ and _Science des Finances_, discusses at length the whole subject of graduated or progressive taxation, and condemns it as vicious in theory and unwise and unjust in practice. Among other things he says: "Progressive taxation constitutes actual spoliation. It violates, besides, the rule, established by all civilization, that taxation ought to be imposed with the full consent of the taxpayer; for, it is quite clear, that in this case, it is the mass of the voters who relieve themselves of the heavy weight of the tax and cast it upon the few, and these few do not consent, even tacitly, to the excess with which the government wishes to burden them. When the rate of the tax is equal for all, we can consider that the vote for the tax by the legislature carries with it the implied acquiescence of all the assessable; otherwise not.... Every system of progressive taxation, however attenuated, is iniquitous and dangerous." And the same conclusions have been reached by a number of other distinguished French scholars and statesmen, among whom may be cited Thiers, Beauregard and Stourm.