Game for Life

In the last week we have studied about class system in the US. To understand it the best we played monopoly with a similar rules like in real life. Each and one of us in groups of fives got a class in the US system. After playing the game for like 45 min we have tried to conclude the results of this game. The most common thing that we came with was that no matter how hard you try the chances that you will succeed and go up by a class is much lower, than you are actually can go down by your class. I'm not saying it's impossible, but is it really hard. I see it related to my life in which my parents decided to move everything behind and move to a different country that success is a little bite more likely to happen if you invest the same amount of time and energy(hard work).