noun
sliding scale
A method or system where a value (such as a price, fee, or tax) is adjusted proportionally according to a changing factor like income or quantity. Often used in economic or administrative contexts.
この制度では、所得に応じて保険料が変わる伸縮法が採用されている。
This system uses a sliding scale where insurance premiums change according to income.
Compound of 伸縮 (expansion and contraction) and 法 (method, law). The term literally means 'expansion-contraction method', referring to a system that adjusts flexibly.