"Like the civil service and the professions, Samsung, Hyundai and their peers tend to hire people straight from the best universities, with little chance of entry later in life. This creates a double bottleneck in the labour market. There are only a few appealing employers to choose from, and only one realistic chance to join them. So youngsters spend ages padding out their CVs and prepping for exams—especially for the test taken at 18 which determines your university." (Quoted from article)