Monitor acts of Paying it Forward. It’s important to reward positive acts of kindness and generosity. But it’s equally important to be quick to address the payback of greed and harm, which can quickly lead to harmful relationships and an unsafe culture (e.g., Gray et al., 2014).
See the Dispositional Greed Scale as a measure of Greed.
Also see the related concept of Altruism and the work of Batson.