by John Marshall Harlan, Pollock v. Farmers' Loan Trust Company Hyde…
“ The United States will bear the whole burden of war. It is necessary that the power of the general legislature should extend to all the objects of taxation; that government should be able to command all the resources of the country,-because no man can tell what our exigencies may be. Wars have now become rather wars of the purse than of the sword. Government must therefore be able to command the whole power of the purse; otherwise a hostile nation may look into our constitution, see what resources are in the power of government, and calculate to go a little beyond us. ”
