noun
a system in which the rate at which sth is paid varies according to particular conditions :
Fees are calculated on a sliding scale according to income (= richer people pay more) .
noun
a system in which the rate at which sth is paid varies according to particular conditions :
Fees are calculated on a sliding scale according to income (= richer people pay more) .
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005