This is a serious issue. To solve this we need to change some mentalities of people.
Everybody want's to be secure by getting a job and not willing to take any risk of starting on their own. If everybody will seek job then who will create the jobs. It's like everybody wants to have the fruit but no one is willing to plant the tree.
People are in the habit of being in their comfort zone.
Overpopulation is a great problem too. A few days back I read on some news that the no of applicants for railway job this year in India was more than the entire population of Australia. Think about it, is our country more developed than Australia. Even if hypothetically we consider it for a moment, that yes it is developed as Australia, then also there would be unemployment issues, as the population is so large.
Disclaimer: Please take all the points mentioned above in a positive sense.