We never did plan the way money would flow into and out of our household and when I look at it today I have to laugh:
My wife's checking account is funded from my social security, her stock dividends, her small federal retirement, small monthly withdrawals from her IRA, and a small monthly withdrawal from my IRA. From this, she pays for groceries, pet expenses including my cat, her clothing and gas, her favorite charities, cleaning supplies, personal items, help around the house when she needs it, and a bunch of other things that I don't even remember.
My checking account is funded by my Navy retirement, my RMD from my IRA, and her small retirement from AT&T. From this I pay the mortgage, energy bills, all the utilities, vacations, entertainment and dining out expenses, phone and internet expenses, TV cable, everything related to coffee and wine, some groceries, all car repairs, home repairs, my clothes, my favorite charities and her car payment. I still manage to sock away about $1200 into CD's every month.
Our smaller checking account is funded by her social security, and one of her other small retirements. From this we pay our car insurance, dental and medical expenses, gifts and yard service.
This looks rather twisted up, and it is, but I am not messing with a "non-system" that works. She is happy and I am happy.
Please note that I am not recommending this approach, it has to just "happen" all on its own and it does require a lot of trust and confidence.
He understands what we been through and he lived on his own when we separated and did just fine and so did I. Thanks for the reminder of the bankruptcies..as if I will ever forget.