shǎng fá bù dāng
当:相称。奖赏与惩罚同功过不相当
汉·贾谊《新书·过秦中》:“繁刑严诛,吏治刻深,赏罚不当,赋敛无度。”
赏罚不当作谓语、定语、宾语;用于处事。
Good work is not duly awarded nor bad work punished.