'My partner earns 3x my salary, we split rent 40/60 and everything else 50/50' What's fair?

As time’s gone on he’s now saved a large amount of money that I haven’t been able to, and whilst we still pay 50/50 for meals out etc, when we moved in 2 years ago he said that our wage gap wasn’t fair and split it in both our favour so that I can now also save.

Alice Tapper