William Strong

“ It is not denied that net earnings of such corporations are taxable by State authority without any inquiry after their sources, and it is difficult to state any well-founded distinction between the lawfulness of a tax upon them and that of a tax upon gross receipts, or between the effects they work upon commerce, except perhaps in degree. They may both come from charges made for transporting freight or passengers between the States, or out of exactions from the freight itself. Net earnings are a part of the gross receipts. ”

“ The answer which must be given to it depends upon the prior question, whether a tax upon gross receipts of a transportation company is a tax upon commerce, so far as that commerce consists in moving goods or passengers across State lines. No doubt every tax upon personal property, or upon occupations, business, or franchises, affects more or less the subjects, and the operations of commerce. ”

“ But, on the other hand, the rightful powers of the National government must be defended against invasion from any quarter, and if it be, as we have seen, that a tax on goods and commodities transported into a State, or out of it, or a tax upon the owner of such goods for the right thus to transport them, is a regulation of interstate commerce, such as is exclusively within the province of Congress, it is, as we have shown in the former case, inhibited by the Constitution. ”

“ A power to tax to this extent may be essential to the healthy existence of the State governments, and the Federal Constitution ought not to be so construed as to impair, much less destroy, anything that is necessary to their efficient existence. ”

“ It is most important to the States that it should be. And yet if the States may tax at pleasure imported goods, so soon as the importer has broken the original packages, and made the first sale, it is obvious the tax will obstruct importation quite as much as would an equal impost upon the unbroken packages before they have gone into the markets. ”

“ It is so in the present case; but we think it may safely be laid down that the gross receipts of railroad or canal companies, after they have reached the treasury of the carriers, though they may have been derived in part from transportation of freight between States, have become subject to legitimate taxation. ”

“ A tax upon the occupation of a physician or an attorney, measured by the income of his profession, or upon a banker, graduated according to the amount of his discounts or deposits, will hardly be claimed to be a tax on his patients, clients, or customers, though the burden ultimately falls upon them. ”