Class Differences in Marriage

In the New York Times Class Matters series that we looked at in class (the graph that tells you what class you fall into) I found an interesting article that discussed the marriage of two people from different social classes.  Both of these people had been marries once before and had two children, but the woman came from a very wealthy background and had received a good education whereas the man was not wealthy and had only made it through high school.  Although this article is specific to this certain couple's relationship, it is quite interesting to look at.  

The article says "In cross-class marriages, one partner will usually have more money, more options and, almost inevitably, more power in the relationship." Traditionally, husbands have the most power in a marriage but money and education seem to automatically switch the roles. Social class, as we have discussed in class, seem to have more power than a person's gender or race.  After the quote above, the article stated: "While most of those marriages used to involve men marrying women with less education, studies have found, lately that pattern has flipped, so that by 2000, the majority involved women...marrying men with less schooling - the combination most likely to end in divorce."  So, it seems that women with more money and education, and therefore more power, seems to cause more trouble in a relationship than when the man holds more power.

So, what has a greater effect on the power holder in a relationship?  Gender or social class?  Why is it that more marriages fail when the woman is of a higher social class?