If you are in the compliance or ethics department at your company, perhaps you should not worry as much about what an employee is doing in their private life as much as what they are talking about around the water cooler.
Large phones are a little more difficult to maintain a solid grip on, after all, so it's natural to worry about what might happen if it slips out of your hand.
But keeping your information in multiple locations (plus your memory) is a recipe for distraction, confusion, and worry about what you might be forgetting.
If your kids are young, your spouse will have the hassle of accounting for the kids' funds separately and the worry of what the darlings will do with the money when they come of legal age.