"Hence as a private man has a right to say what wages he will give in his private affairs, so has a Community to determine what they will give and grant of their substance for the Administration of public affairs."

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We may be assured by past experience, that such a practice [as some states charging high taxes on goods from other states] would be introduced by future contrivances; and both by that and a common knowledge of human affairs, that it would nourish unceasing animosities, and not improbably terminate in serious interruptions of the public tranquility.

— James Madison