who pays the piper calls the tune
谁付钱就有权决定
口语·指出资者说了算
英文释义
the person who provides the money for something gets to make the decisions and control how it is done
例句
Since the investors funded the project, they decide the direction—who pays the piper calls the tune.
典故来源
源自中世纪欧洲，雇佣吹笛者的人有权决定演奏什么曲子，比喻出资者拥有控制权。