I think one of the most important aspects of a healthy marriage is being financially aligned. My wife and I are both similarly frugal so it works out well. Any large purchases we make are typically experiences together anyway like a vacation or a new shared car. We always make those decisions as a unit.
Could my wife afford our lifestyle if not for my salary? Probably not. But that’s the joy of being married to my best friend, I can drag her along and elevate her to my level. And she elevates me in so many other ways. Finances is just one piece of a big pie that is marriage.