This is definitely financial abuse. I couldn't stay with someone who had that attitude, letting me cover the cost of food and child expenses out of my pocket, whilst they got to have savings.
When DH and I had separate accounts the first 6 years, we still treated it as "our money" and we didn't split child care costs, food rent etc - we were barely surviving and just had enough for essentials - and we had a good idea of our expenses. If someone had hardly any money in their bank account, the other person would cover expenses.
I then didn't work when I was SAHM - about 18 years in total, here and there. We only had joint bank accounts then, and I was free to spend the money DH earnt - we both would discuss larger/unusual purchases. Any bonus DH earnt, went straight to the mortgage - he never spent it on just himself.
Things have changed and we are in a better financial position and I work, but I only earn less than half of DH's salary, but we still pool our money into the joint accounts, and no separate accounts. We have more room to freely spend on bigger ticket items.
It's not 100% rosey though - DH's attitude did change a number of years ago just after my mum died and he became a bit obsessed at times of not having enough money - he knew I was going to get a decent inheritance, and I've pulled him up a number of times and told him he is being financially abusive - the inheritance mostly went into paying off the mortgage and purchasing 2nd property. I am seriously thinking about asking DH to go to couples counselling with me so we can talk through it. It only rears it's ugly head every now and then - but I've had enough. I would leave him if he was like that all the time.