I think this is a good idea to have a job while they are still students. I'm a student and I know students need lots of things to buy in order to do their hobbies or interests. Also students need to realize that it's hard to earn money because in the future, if they didn't learn how to manage their money, they will waste all the money and ruin their lives. And here are my more examples and opinion to support my idea.
Firstly, students need lots of things to buy in order to do their hobbies or interests. In my case, I like basketball and listening to music. Even though, I only have two major interests I need lots of things to buy such as for basketball, I need two shoes for inside and outside. Also I need basketball shorts and comfortable t-shirts. I like listening to music and one day I wanted to play guitar.
So I bought a guitar and I still need a guitar-amp. Also I need to take a lesson and buy a book. Also I want to buy a CDs and clothes for my favourite bands. And in order to do these things I need more money than I get from my parents.
Secondly, by having a job when they are teenagers, they can learn that it is hard to earn money. They need to learn that it's hard to earn money because if they don't, they will waste all the money they have and ruin their lives. Therefore some of them will start saving some money for futures. For example, in my country few years ago, it was serious problem that people use their credit cards to buy many things before they even think how they will use them. So...