Fiat Tax

Fiat Tax means:
a tax applied at the same rate to all levels of income. It is often discussed as an alternative to the progressive tax. Proponents of a flat tax argue that people able to retain larger portions of higher income would have added incentive to earn, thus stimulating the economy. The Tax Reform Act of 1986 provided a flatter tax rate schedule than the rates previously used, but more brackets have since been added.

See Tax Rate and Tax Rate.