In many countries students like to have a part-time work to earn some money. But in my opinion, they belive that they could be able to manage their studies along with thejobs, but they just divert themselves from studies.
Firstly, by doing some part-time job student can become more responsible and independent. By starting earning in a teenage, one student could become more self-seeking for money and other could be able to buy something according to his/her wishes. When student or teenager have some pocket money he/she can buy whatever he/she wants or also can buy some presents for his/her parents or relatives.
Secondly, usually students work, because they must pay for their education. They have to work, because their families do not have money to pay for children's education, so, they force their children to do some part-time job.
Finally, I must say that to earn money in young age is not a bad thing to do. A student must remember that he/she is doing just part-time job. He/she must remember that education is in the first place.