Определение sliding scale в Английский Язык Английский Язык словарь
Payments such as wages or taxes that are calculated on a sliding scale are higher or lower depending on various different factors. Many practitioners have a sliding scale of fees. a system for calculating how much you pay for taxes, medical treatment etc, in which the amount that you pay changes according to different conditions on a sliding scale
varying scale used to determine wages that takes various economic factors into consideration