What is the main goal? Some may think that it's getting better at something to get a raise and more money. First there is a school, then there is the 1st job, the you try to get a better one and you are trying and trying and trying to get higher. In my opinion, that's not the main point and it's just a side-effect of the life.
Article suggests that 1st 15 years of life is a training or a tutorial, but I disagree. They are as much as important as any other time period. Person should do what makes he or she happy. If it's playing video-games or spending time with friends at a bar, it's okay. Of course, it won't affect your skills on getting a better job (so more money), but if it makes you a happier person, do it! Life is all about being happy and doing what you love to do.
There is no magic-prize at the end of the life, only memories. What will be the point of having much money and good CV in you will sacrifice your happiness on it.
In my opinion, this video[1] nicely shows what I'm talking about.