'The grader good' is a pun on the phrase 'the greater good'. Greater good: for the benefit of the many, not the few. The greater good is the safety of individual rescuers: "The Environment Ministry isn’t requesting the grader be removed because of the risk it would pose to individuals having to enter the river"
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.