That's a lot of assumptions Curly, I find your post rather patronising and rude to be honest.
Not sure why it bothers you so much but dp and I aren't married because we errrr just don't want to plain and simple it's not our thing,not our bag. Neither of us are showy types, we both hate stress,our families couldn't care less and the marriage ceremony itself(and I've seen a few) makes me want to vomit however you scale it down it's still vom inducing.
Dp's sister has been with her partner 20 years the same as us, not married for the same reasons- just not their bag. They've just got married recently for purely financial reasons which they want protected,reg office then hot choc at Tesco's.
Both sets of grandparents are in verrrry long marriages 50 years. My m&d met at 17 so none of us are unmarried because we've been scarred and want to bolt.Long relationships are what we're all used to.
Regards dp and I we met at uni and both knew that was it,marriage just wasn't high on our to do list. We wanted to travel,enjoy postgrad life our 1st flat etc. Knowing you've found the one you don't feel the need to proclaim to the world you just know. We don't need to talk the talk we walk the walk.
During 20 years we've supported each other as penniless students at diff times, endured 7 years of IVF and my near death as a result,re-location too many times to mention,redundancy and having 3 longed for dc in 15 months and the subsequent lack of cash and stress that having kids brings. If we were both waiting for somebody better to come along believe me we'd have parted long ago. We're both in it for the longhaul which is why we're both still together.
Married couples don't have the monopoly on committed relationships it is possible to be committed and not married.
I still don't see how a piece of paper and a ceremony ensure life long committment only love does that real love the type that endures through thick or thin that I have to say not everybody is lucky enough to find married or not. I think the divorce statistics back me up here.
Now having said all that the widows benefit would be useful. My sister is getting married this year and she's not smultzy at all,very like me. We're going to see what she comes up with then may very possibly do the deed just for financial reasons. Personally I don't think thats a particularly nice reason to get married so we'll base the whole tiny occasion as a personal celebration to ourselves celebrating our 20 years of unmarriedness