William O. Douglas,
Richfield Oil Corporation v. State Board of Equalization…
“ The tax was nothing more than an effort of California to defray a part of the state's expenses by a uniform sales tax on all those businesses, including Richfield, which enjoyed California's natural resources, the labor of its people, and the services and protection of its government.True, the tax would impose a burden on export commerce to the extent that it increased the export price of Richfield oil. But if a tax on export sales be unconstitutional for imposing such a burden, so is a property tax or a severance tax applied to Richfield's oil anywhere from well to consumer. ”
