Felix Frankfurter,
Wisconsin v. J. C. Penney Company…
“ Ambiguous intimations of general phrases in opinions torn from the significance of concrete circumstances, or even occasional deviations over a long course of years, not unnatural in view of the confusing complexities of tax problems, do not alter the limited nature of the function of this Court when state taxes come before it. At best, the responsibility for devising just and productive sources of revenue challenges the wit of legislators. ”
