Hubby and I have one joint current account and one joint savings account. We have seperate credit cards but only so that we can buy each other things for Christmas and Birthdays without spoiling the surprise. We don't hide the statements from each other so it is up to me if I want to find out what store he has brought my present from. The rest of the year we usually glance at each others statements so that we have an idea of how much money to keep in the current account.
He earns about twice what I earn. My money basically pays the mortgage (ie. the mortgage payment goes out after my pay day and there isn't much left), so we live on Hubby's money for everything else.
Last summer there was the possibility that Hubby would have to give up work due to ill health. Luckily he has pulled through and continues to work. But now I am in the position of facing redundancy in the new year.
Having joint accounts meant that when he was too ill to talk about finances, I was able to assess what we needed to do to survive on one income. I wouldn't have made any changes without discussing it with him, but I could do the research into our options. If we had had seperate accounts then that would have been a lot more difficult.
Now that it is my job that is threatened, I am in the position of possibly having to live on his money only. Knowing that we trust each other completely, it isn't an issue. I don't have to worry about whether he will resent me taking 'his' money.
I agree with others that it would be a different issue if Hubby couldn't handle money.