It is admitted that the power of taxing the people and their property is essential to the very existence of Government, and may be legitimately exercised on the objects to which it is applicable, to the utmost extent to which the Government may choose to carry it. The only security against the abuse of this power is found in the structure of the Government itself. In imposing a tax, the legislature acts upon its constituents. This is, in general, a sufficient security against erroneous and oppressive taxation. The people of a State, therefore, give to their Government a right of taxing themselves and their property, and as the exigencies of Government cannot be limited, they prescribe no limits to the exercise of this right, resting confidently on the interest of the legislator and on the influence of the constituent over their representative to guard them against its abuse.