In many parts of Europe, we have swathes of young girls who have children with any local moron so that they can get "government childcare" for the rest of their lives. It doesn't encourage them to work, quite the opposite. It's a career in itself.

In addition, they have to have government provided housing, creating ghettos of deprivation. Their children don't grow up with any aspirations beyond the welfare state handouts, and the whole cycle starts again. The government gets to subsidise the crime this generates as well.

Make it far more punitive to have children without planning and remove all subsidies for government support on welfare for those who wilfully rely on the state. Of course, this means one needs much better sex education, contraception available from an early age and sensible abortion policies. People with a sense of personal responsibility would help too - I favour a parenting licence, myself.