Robert Giffen,
1911 Encyclopædia Britannica
(1911)
“ The payers of income tax, unfortunately, are not one class but many, and although the rate of duty is the same, the dentition of income seems imperfect, so that many pay on a much larger assessment of income than seems fair in comparison with other incomes of nominally the same amount, but really of much greater value when all deductions from the gross sum are fairly reckoned. If all who pay income tax are lumped together and contrasted with those who do not pay, then there is a false division to begin with, and there is so far no means of establishing equality or inequality. ”
