Does a more expensive wedding lead to divorce?

There's paper that piqued the interest of everyone on Twitter and Facebook about the drivers of divorce. The claims that caught most peoples eyes the most were around the fact that a big, cheap wedding seemed to make it less likely to divorce. 

It's interesting that they only used 1 source of data collection (i.e. 1 survey), which asks people to remember how many people attended a wedding and how much they spent on it. These might remain salient issues to some people long after the wedding, but you could argue that for the couples that divorced, they may actually remember the event differently over time than those that remained married. 

Also, just because some participants are married now, doesn't mean they'll remain married forever. Methodologically, it would make sense to approach this as a "missing data" problem and you'd probably need to assume that some of the people who are currently married would eventually get divorced. 

Which begs the question: is a successful marriage just one that lasts until one party dies? If not, then why are people so obsessed with the longevity of relationships?  Overall, I agree with the paper's conclusions that