High-income retirement savers may have to pay tax now on catch-up contributions. Eventually.

Efficiency is Nana Guenther’s love language. It is also her profession. The thirty-seven-year-old Torontonian spent a decade in corporate accounting before realizing that her true calling was process automation: streamlining her clients’ existing systems and separating the tasks that need person power from those that might just as well be managed by a computerized solution. When Guenther and her husband, Phillip, became the parents of one boy in 2019 and a second three years later, she saw that her domestic life was in need of her professional expertise. “Two demanding careers, two boys...