They allowed him to keep the extra money as a gesture of 'goodwill'.
a 'goodwill' ambassador on a 'goodwill' tour/mission
She has/feels 'goodwill' toward all her coworkers.
(..) no citizen of this country can call themselves blameless, for we all bear a responsibility for our fellow man. I am appealing to men and women of God and goodwill everywhere, white, black and otherwise. If you believe all are created equal, come to Selma. Join us. Join our march (..)2014 Selma