As pointed out, if the property is in England and it's a joint tenancy then the split is 50:50. But that's just a legality.
Relationship-wise, as a man who earns much more than his wife, I think he's being a total arse.
He has contributed more, so f* what? I could maybe understand when the partner who earns more feels exploited if the other fritters money away on frivolous stuff, but this doesn't seem to be the case here based on what you described.
It feels to me like a rather childish, petty way to regain control of the situation when he feels under pressure. Oh, s*, we're fighting, maybe I'm even wrong, quick, let me come up with something that's irrelevant but will make her feel bad and guilty...
I must have contributed some 80% of deposit + refurbishment costs and never once has it occurred to me to bring that up, not even in the most furious fights.
Our arrangement is that our salaries get paid into our respective (sole-name, not joint) bank accounts, and every month we both contribute into a joint account. Mortgage, bills, nursery fees, etc - all the family expenses come out of the joint account.
The amounts we put in are different for me and her - basically we each put an amount which reflects that I earn more (so I contribute more, obviously) and which leaves each of us a decent amount for discretionary spending / saving from our sole-name accounts.
We have other issues ( www.mumsnet.com/talk/relationships/4709088-how-to-cope-with-an-almost-sexless-marriage-can-counselling-really-help?page=1 ) but we have NEVER had the slightest disagreement when it comes to money. We have never asked nor commented anything on how the other spends their money.