Well at least all these men with much younger wives (20+ years younger) will have a carer when they're 70+ 
I am laughing at people saying 'well you COULD marry someone roughly the same age as you, and they could end up having an illness or accident that means they will be needing full-time care at only 33 or so.
But the fact is that if you marry someone a generation older than you, they are far more likely to be infirm. and needing care, while YOU are still quite young. And you are far more likely to end up as a carer for an OAP, (when you are little more than 40-45.) It will probably be alongside caring for your own parents AND possibly looking after children. Probably need to work as well, as his pension won't go far!
It's like that stupid argument of having kids older (like 43-44+.) When people mention the child could be left as an orphan by their mid 20s (or having to care for elderly and infirm parents,) someone ALWAYS comes along and says 'but, but, someone who had their babies by 27 could ALSO become ill and infirm, (or die,) by the age of 45, STILL leaving the children with no parents at a young age too!'
The fact is though, that it's far more likely the kids will end up with no parents at a young age if the parents are 43+ when they have them, than if they have them at 26-27 or younger!
Also, I agree with the majority. Although a few people are denying it, and calling people 'narrow-minded' and judgemental, I seriously judge any man who goes for a woman 20+ years younger, and think there are ulterior motives behind it. He is looking for a potential carer probably, and any young woman who goes for a man old enough to be her dad has underlying issues. Take offence if you want, but she does.
If my DD (mid 20s) came home with a man of 45-50, I think I'd throw up. I would be utterly horrified, and wonder where we'd gone wrong. I would also question the motives of the man, and worry seriously for my DD's future, looking after an infirm and crotchety auld man (in 15 to 20 years time,) when she is only 40-ish, and should be living her life the the max. Also I would worry about the prospect of their children (if they had any) for several different reasons that I won't mention.
Finally, I echo the views of some people on here, that there is this bizarre, romanticised idea of how lovely and dreamy it is, being with a mature older man of 45-47 ish when you're a starry-eyed, immature young 20-something.. (and please spare me the 'lots of young 20-somethings have lived a full life and have lots of experience' bolleaux, because most have NOT, and many are quite immature..)
However, the reality is that no middle aged man should be in a relationship with a woman who is young enough to be his daughter. It's just weird. For sooooo many reasons. Already mentioned on this thread. I know a few people are getting sniffy and huffy with people saying this, but it's true. The vast majority of people saying it, cannot all be wrong.. And the young women dating much older men are seriously deluded. Seriously.