I think spouses not having access to the family finances are a recipe for disaster. What happens if one spouse is ill or dies? Each spouse should always have access and know whats going with all the important information. That includes the woman knowing the financial picture and where all the documents are as well as the husband knowing all the important information about the kids.
People talk about divorce as if its a bad thing. In the past, many women had to stay in abusive marriages and had no ability to leave. They had to deal with drugs, violence, cheating spouses etc. Baruch Hashem women have the ability to support themselves should they need to!