プログレッシブ和英中辞典(第4版)の解説
ほんまつ【本末】
〔始めと終わり〕the beginning and the end;〔順序〕the (proper) order;〔軽重〕the important and the trivial
本末を転倒する
confuse the order of things/fail to put first things first/put the cart before the horse
制度の欠陥を無視して個人の落ち度を非難するのは本末転倒だ
It is getting things backwards to blame individuals, disregarding the defects of the system itself.