Check this out. I am not sure I understand what you mean by "Kassir", so I gave you few other options.

College education is very important for everyone nowadays.
For instance, someone with degree is at the higher demand on the job market. When someone attends educational establishment, he meets new people, matures and develops as a person. Also, it is much easier to get a job after college rather then after just a high-school.
However, when a person starts working right after high-school graduation he gets the opportunity to provide for himself. He, lets say, can buy himself clothing, shoes, food and many other things. He can still move up the corporate ladder, for instance starting as a consultant and getting promoted to Accountant (Management, Cashier) position. Besides, when you are employed, you start your life as independent adult.