JUST FUCKING COMMUNICATE. I can't with Japanese people.
I mean, not properly communicating and just assuming things isn't a Japanese only problem. Its pretty global.
The husband being insecure about being able to provide, and the wife feeling inadequate or as I she's not "contributing equally" is a pretty common insecurity. And people don't like to talk about insecurities, because its easier to have just doubts then to possibly have them confirmed.
The part that makes it especially bad in manga is the language. Because you drop the subject of what you're talking about things can get confusing and add extra assumptions.