According to The Bump, spoiling children has many negative long-term effects, including unhappiness, irresponsible behavior, defiance and disrespect. Spoiling a child may keep them from learning the kind of life lessons that are markers of development. It's important to set boundaries for kids so that they experience healthy emotional development.
General unhappiness is one of the most severe outcomes of spoiling children. Kids learn to find contentment only through wish fulfillment, which may lead them to pursue things later in life that don't actually bring happiness. An example of this is the pursuit of material possessions. Spoiling children early on can also lead to emotional immaturity and under-developed problem-solving skills. Spoiled children don't develop a proper understanding of limits or consequences, and this can lead to a host of irresponsible behavior later in life, from overspending to gambling and drunk driving. Spoiling children also teaches them that manipulation can be used to get what they want. This often leads to a lack of respect and an inability to express needs in positive ways. Spoiled children often fail to develop proper levels of empathy for others and may have difficulty maintaining adult relationships unless they are consistently catered to. According to Aha! Parenting, setting limits for children is vital to proper emotional development and helps build both self-esteem and respect.