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.
(..) of all French people who don't know if they're on the left or the right or in the center because they are above all men and women of goodwill. I want to tell them that regardless of party politics I need them. And I need them so that everything (..)2016 Me Before You