Exactly this.
Men coming out with this sort of nonsense really pisses me off!
When I was living with my husband, we had a 3 bedroomed house. We paid bills on a 3 bedroomed house and we raised 2 children.
When we split up, the bills didn't really change. Rooms still needed to be heated and lit and food still needed to be stored in the fridge/freezer and cooked in the oven. The children still needed clothes and to have their bedrooms decorated and furnished. They still did activities. It still cost the same to do those things. The only bills that changed were food shopping and CT. Nothing else changed.
He paid a decent amount of maintenance for the children (one of whom was his step child), was never late in paying and never questioned how it was spent. He moved back in with his parents for a couple of years so, if I wanted to go on holiday with my friends, he'd stay at mine so that the children could continue to live in their own home. He provided for them during that time and never quibbled about maintenance because I was still paying for the utility bills whilst I wasn't there and they all were.
He also contributed 50% to additional costs for trips and school uniforms.
We didn't go through the CMS. He used the CMS calculator and I didn't question it because, when he got a payrise, he told me and increased it and, tbh, I got enough. I wasn't interested in seeing whether I should have got £20 a month more.
Maintenance isn't 'fun money'; it's his financial contribution to raising the children, supporting the household they are raised in and to maintaining their lifestyle. If he wanted to buy them anything extra, he did. Just like I did.
My exh saw his responsibility to continuing to raise his children to also include me having a life outside of them because he believed that if I was happy and fulfilled, I would be a mentally healthy and a better mum than if I were constantly stressed, worried about money and socially isolated because of it.
One of the holidays I took was a week in Italy with a man I was seeing. He moved in to mine for the week and never once questioned whose money was paying for it. It wasn't his directly but I couldn't have afforded to go if he hadn't contributed to the household financially because more of my salary would have gone on the everyday stuff.
He could be a dick in many ways (and has turned into a monumental one since he remarried!), but only to the children. I have nothing to do with him anymore. But he was never a dick about that.
I have no time for men who begrudge supporting the family they created and I wouldn't be in a relationship with one either.