And there's the problem. I'd be totally comfortable if my future wife ended up being the financial supporter of the family. There's technical things I'd like to invest time and mental resources in that wouldn't necessarily make money, but would be fulfilling, and housework is already something I do a lot of and wouldn't mind being more responsible for if I wasn't spending 40+ at the office.
I can't imagine dumping my career whilst I'm the higher earner, but if she ends up making more than me (kinda likely actually, given some time), it might be the most sensible solution. Marriage should be a team activity where either partner is willing to take on whatever role is best for the family.