Why does having too many young people in a country cause a problem?

Having too many young people in a country can strain resources and services, such as education, healthcare, and employment opportunities. This demographic imbalance may lead to high unemployment rates and underemployment, as job markets struggle to accommodate the influx of young workers. Additionally, a large youth population can create social tensions and instability if their needs are not met, potentially leading to increased crime rates and political unrest.