Right, so this thing about "family money". My DH was one of those, a long time ago, who wanted to keep absolutely everything separate. We got a joint account for bills when we had DS1. Then after two years we sat down and recalculated things because I was always having to ask him for more money each month (I was the lower earner and on mat leave). He was happy to sling me an extra thousand quid every few months ad hoc, but that didn't work for me, I wanted us both to contribute to the children's upkeep more obviously, so he could see clothes trips treats football lessons etc all coming out of our joint money and never have any vague feeling that I'd just "overspent". He was of course fine with this (this isn't a thread about financial control, our communication is fine & power balance good!)
He still says, though, that he has "chosen a higher earning job than me"; which to be fair he did, before we ever had kids or even met each other. So while we should contribute proportionally to our joint family, we should each keep our discretionary money for ourselves. In practice he puts loads in his savings (so I'm sure I'll get it in the end, ha ha!)
But is he right? Part of me thinks yes, as long as neither if you is in financial trouble or hasn't got enough, and if you take the long view, the higher earner can stash their spare cash away in accounts the other has no access to.
But then I think it's a grey area- I'm not progressing as fast in my career as I would have done if I didn't have children, and that's not quantifiable. I am part time, so we know what we save on childcare and the value of that. But... I was part time before kids too! I like being part time & would want to stay that way. He likes being full time.
If we were both full time and both absolutely went for it, he would be earning say £100k a year and I would be earning say £90k a year. As it is, I earn £50k and he earns £100k. So this AIBU isn't about being tight for money. Am I BU wanting our discretionary personal money to be equal; or is he BU, saying that once we've provided for our family together and proportionally, we can have different discretionary amounts for fun and savings, because we have different careers? I think his view is fair, but because he loves saving money, and it's always me who pushes to spend money, that can muddy the waters.