Hi OP,
I think you need to have a heart to heart with your husband about how you feel and go right back to basics and do a budget together and decide on some shared goals.
You need to tell your husband that you respect that he plans for your future and has simple tastes but he is making you unhappy in the present and that you want/need to work out a compromise that you can both live with.
(Disclaimer - we are on a modest income so our budget is nothing like this so I have very little idea of actual appropriate figures!!)
You are high earners so with that in mind for example
- he might suggest £500 groceries/household budget. You might prefer double but compromise on £750.
- budget for meals out - compromise on £400/£500? (we spend £100 on a chippy tea once a week and the odd McDonalds!)
- "grooming" £200? He probably won't need a budget for this if his needs are just a £10 haircut or owning a pair of clippers
- "baby" £100/£200? This could be saved when the baby doesn't need anything and splurged when they do. Don't make the mistake of baby items needing to come from your personal spends.
- each of your own pots for clothes/gadgets/whatever - £300 - £1000 - I have no idea but will be less if you can have separate savings budget "pots" for things like "holidays" and "replace car" You could perhaps encourage your husband to spend his budhet and treat himself.
Then you need to budget also for the things that might be more important to your husband. Allocate an amount in your budget each month for "pensions", "emergency fund one years expenses" (or however long you both decide", "long term savings", "upsizing/extension", baby's university fund (and school fund if you intend to go private), baby's house deposit, wedding, driving and car, same for any siblings planned, maternity leave, ....
Don't forget to also budget boring stuff like monthly, annual bills, maintenance...
When you start to consider each others needs and wants in a balanced way you might find that you are willing to compromise a bit on the restaurant budget, and willingly so, if it means your child (and any siblings) have healthy driving, university, wedding and house deposit funds. You need to strike a balance between today and tomorrow that you can both live with.
A budgeting tool/app such as YNAB can help you both to track that you are sticking to the agreed budget and once you have hammered it out your husband (hopefully) might see the win as staying in budget on a category rather than spending nothing. So for example if you agree your restaurant budget is £400 then you don't want to hear any negativity about even a £200 meal as long as over the month you are on budget.
If you can listen to each other and respect each other's viewpoints hopefully your differing viewpoints can form a happy balance.
Re planning for the future I used to be fascinated watching the "Real housewives of Orange County" episodes filmed during the financial crisis of 2008. I was amazed to see the people that had held lavish (and i mean lavish) parties for their partner's birthday with accompanying gift of very expensive motorbike or $40,000 Rolex watch worry about losing their homes the minute the crisis hit. I couldn't believe that they would buy those things when they had not paid off their mortgage and had no emergency savings!!