我的 理解是当你读本科 每个月给500 时， 你很省吃简用，很少出去校园， 结果也够了 当你读 master or Phd, earn 1500 - 2500 /month, you realize still nothing to save because you start to eat in restaurants. 这是因为 在这里， 你的真实消费需要是 大概 2000 左右。 但是当你 工作每个作 earn 3000 - 5000, you start to shop in branded shops in Orchid road, in the end of each month, you probably can save some money. Still when you earn more, say 8000 - 20000 per month, you realize you save most of your money. Still when you earn more than 20K per month, you start to concern about how to spend your money. Normal goods, no problem, but probably still not enough if you think about big things, like branded sports car. ..... wonder never cease, similarly human desire never cease!!! Only when you are billionares like Mr Gates, you start to think about what is the meaning of Money. Then you start to donate money for charity. haha, sounds logical?