fourtothedozen do you think couples that spend more on their weddings are more likely to stay together?
Not addressed to me but your questions are winding me up so I thought I'd respond anyway 
Firstly, what do you think?
Secondly, If our wedding counts as expensive, then I'm happy to report that we are very much together and as happy as ever.
Thirdly, I'm guessing from your budget upthread that you had a "get married, it's the most important bit, everything else is flim flam" kind of attitude? (whether that was through time constraints, budget constraints or philosophical approach is irrelevant, and I'm making no judgments on your wedding day). So having had that kind of wedding, do you think it's pointless when others spend far larger amounts on their wedding? I mean, technically, you're right, the ceremony (and associated legalities) is the only thing you need to be married. However, you appear to be saying that those who choose to spend more are wasting cash and that this reflects somehow on their relationship, whereas I see it reflecting their attitude to, well, spending cash (on things they perceive as worthwhile). Of course there will be couples who are desperate to mask relationship issues by having a massive show-off wedding, but equally, there will be couples who get married too quickly (and most likely cheaply) in the first three months of knowing each other (something which I think might predict a higher likelihood of divorce).
Fourthly, I actually wouldn't be surprised if there was a correlation between the amount of money spent on a wedding and divorce rate, linked to a socioeconomic group (I'm speculating, I don't know if there is such a link). So, for example, there may be a link between good careers/longer relationships before marriage/fewer children/higher earnings/more disposable cash and marital success, and those people are more likely to have spent more on their wedding day. On the flip side, marrying younger and more humbly (i.e. "cheaper" weddings) might be associated with higher religiosity, which would predict lower divorce rates. I don't know.