How do you come with this conclusion? That kind of thing only happened in the movies, tho money also an important aspect, but being 'rich' is never consideration when someone want to settle a marriage. I believe if you look around you, there will be many couples who are married and they are still financially unstable. Even some people get married to have more stable life, so they can have more commitment to their job, one of the process to get 'rich'. As long as they have chemistry and they love each other at the moment, people will just get married most of them never think a long run for marriage, and that's also why divorce case is not very rare.