The other danger with this hero/huge money reward is that some not-so sure guys in a similar situation in the future will try just that , to be a hero, and maybe try to imitate what is not imitable...Same effect as punishing : in both cases the total wrong thing to do if your aim is to improve safety..
As to sharing the money with his co-pilot, maybe he should better share it with the guy that trained him to evaluate the parameters and apply the best solution/decision .
Of Course a real " hero" would refuse the money arguing that he just did his job that day.