Fourthly, such taxes, by subjecting at least the dealers in the taxed commodities, to the frequent visits and odious examination of the tax gatherers, expose them sometimes, no doubt, to some degree of oppression, and always to much trouble and vexation; and though vexation, as has already been said, is not strictly speaking expense, it is certainly equivalent to the expense at which every man would be willing to redeem himself from it.