Thank god my DP isn't on mumsnet!!!
He earns far more than me, and I am on a fairly low salary even compared to most. He on the other hand earns 6 figures, has a great lifestyle, savings, investments all that jazz.
However, I used to actually be senior to him, and earn far more. However a number if years ago, before we got together, I had a child, couldn't maintain the same energy or commitment, was making myself ill trying to do both, and decided to leave the rat race and do something that felt good. I now work for a local charity, grass roots level, earning crap money but doing good in people's lives.
Thankfully, he understands and supports me every step of the way. He pays the majority of things however we are a team. I tend to pick up more of the family admin as logistically have more time but as we come up to our 10 year anniversary I'm happy to say I absolutely still adore him, as does he with me. It works.
Also we only got together in his 40s so he had a lot more to 'lose'.
My advice would be, look at the person, not the finances.