Comment by countfalafel

Consider that even if a married couple maintain strictly separate accounts, negotiate with one another about how much of each partners' money should be spent on this or that expenditure, and live separate financial lives, in a lot of places it's still all marital property. So in the event of the (very real and frequent) diverging life goals you raise, all the hardball they played with each other doesn't even matter. I don't have the password to your bank account where you keep "your" cash, but just wait until I call my lawyer to claw back my half of our marital property!