It is probably not a good idea to have one spouse in complete control of all family assets. That's not to say that a spouse with a particular skill in managing money should not use that skill, but that spouse should always discuss with the other spouse what he or she is doing. There are several ways you may decide to divvy up the responsibility. Some couples keep their earnings separate but agree in advance who will pay what bills. Some couples put every penny of their financial lives into a joint account.
Financial togetherness can be as intense or as separate as the parties wish.
As long as the goals and attitudes toward money are shared, the mechanics of fiscal management are less important. Be sure each partner has some money they can spend however they like. The amount, of course, depends on your financial circumstances. Neither spouse should ever have to beg for money. If you spend more than you earn, work out a budget together and follow it for at least a year.