Funnily enough, this is close to a flat tax with the total amount offset by the poverty line (so that the amount paid is zero or negative when income is low).

Funnily enough, this is close to a flat tax with the total amount offset by the poverty line (so that the amount paid is zero or negative when income is low). Added: Something along the lines of 0.16 * income - 0.16 * 12000 or (income - 12000) * 0.16.