There's a lot of research to suggest that this is why kids from lower social-economic backgrounds have lower levels of self-control. They're so used to negative outcomes that they've been neurally trained to immediately take a positive outcome even if a more positive outcome would present itself if they waited.

The classic experiment is the cookie experiment, where the outcome is by resisting a plate of cookies they can have as many as they like but if they take one straight away they only get one. But it generalizes to many other outcomes too (not sure if outcome is the right word but you get what I mean?)