Life is not like math, because life is real, math is abstract. So not all can be reduced to absurd. In this case, absurd is the money that influence our lives crucially.
Who is happier, the father or the son? The father remains sad despite his richness, while the son never complains. Obviously the father should try a less pessimistic attitude and learn from his son the art of enjoying life, because rich is not the one who has the most, but the one who needs the less.
A parent could also learn from his child a different point of view of the actual society. Although apparently the parent has overcome the experiences of the youth, the truth is that the parent lived at different parameters. Therefore, even if the father already lived the age of 25, he could make a short trip back through his child, too learn that there is a significand difference between earning money and doing what you love most, which essentially reduces at the difference between sadness and happiness.
If you like what you do, you will never feel like working a day in your life. The son sees his job as a pleasure, compared to his father who is not nearly as happy as him. The lesson that all adults should learn is that a perfect life comes when you follow your passions without expecting a certain amount of money in exchange.