In the modern era, it takes a dual income household in order to live comfortably.
I think that it doesn't matter who makes more, but because of how I was raised, being a man, I'm likely to be self-reliant even if I'm struggling. I have no problem sacrificing to make things work. If you want a functioning system, you have to be willing to give things up for a while sometimes.
What I don't like is when people put implications on financial and social status that elevate the ego. Nor am I a fan of the idea of taking care of someone. I strive for mutual independence. You cover your ass, I'll cover my ass, and if either of us needs help we'll help each other when and where we can, but never rely on each other.
I find that doing it this way keeps the relationship healthy, so you aren't arguing all the time about financial problems. Which, the two most common arguments within a relationship are jealousy and money.
I think that there are simple answers to each of these.
It just requires you to not be a dumbass.
Some people like drama though. I don't really understand them, but whatever I guess everyone has something that motivates them. So, to each their own I guess.