How does your fictional world respond to this? There are always those who will resent any kind of success in others. What can your hero/heroine do to overcome that? How does your hero/heroine react to others doing well? Hopefully they would react with the generosity of spirit we'd all like to see in others!
Expectations can be shaped by cultural norms, history, experience and so on so what is the driving factor behind your fictional world's culture? Does anyone ever challenge it? Are the expectations justified? Romeo and Juliet is a classic tale about expectation being challenged given the state of the relationship between the Montagues and Capulets at the start of the play.