How does this actually work for people with combined bank accounts (ie, how is the interest paid)? Would you just use the shared money and put the brokerage account in the lower income spouse's name? Would paying interest be necessary or would it be considered a gift?

Another thing (from http://www.rbcfinancialplanning.com/...t-purpose.html)

Another simple but very beneficial strategy is to use the income of the higher earning spouse to pay living expenses and tax liabilities and use the income of the lower earning spouse to make investments. This way, investment income earned will be taxed at the lower earning spouses’ rate.

Again, how would this be done if you have joint accounts? Just putting the investments in the lower income spouse's name?