OOh I like this discussion! It is making me think that fair should be each puts a 'spending amount' that is equal away each month, but a proportional contribution for the bills instead and surplus to a joint pot to be spent between.
This is what I think roughly. Both men and women prioritise differently, and I wonder how much this too is down to capacity to spend eg (some silly generalisations whilst I understand my own mind!....)
Men tend to (have to) spend less/sacrifice on appearance things eg no make-up, fewer clothes (but some items are more expensive, so perhaps that cancels out), and can get away with a few staples, where I feel judged/my clothes are expected to be/ I like my clothes to be distinctive and many and I am expected/need choice depending on how I feel - men seem to be less concerned about this.
(personally I think really that this is a 'couples cost' in that slight role expectations are sort of jointly expected IYKWIM. )
Men seem to (oh the generalisations!) push for things like bigger cars, expensive hi-fis and tellys, games consoles, tools etc. women I know seem to desire small inexpensive green cars, but prefer new, but also seem much more likely (don't know if its because of being better organised/more affected by poor living environment/hard wired to keep home order a bit more because of child expectations) to spend premium on stuff for the home eg nice dining set v 'at least one or two plates' or 'nice mugs that make me feel good v builders chipped mug etc etc. or decorative things that are not strictly 'necessities'.
Men seem to drink more often and more expensively eg whiskey etc, but I think probably per unit women and men about equal unless you are rigid 'women drinking wine, man drinking pint' person in which case the expense of 'female' drinks probably compensates for the frequency of 'male' drinks.
With children, I think men seem to want big single expenses eg big trip, big toy, day out, and women want BOTH big single expenses AND the raft of sensible everyday stuff - it was me who wanted two styles of nappy bag one practical for carrying about and one comprehensive, me who wanted to get a second car seat for rellies, ( oh no hang on, he totally agreed - where does that go???)
I think this sounds like a great sociological/pop sociology study worthy of women's hour/thinking allowed! Can MNHQ survey and get on to WH??