An executive or even just regular managers working more sounds like a recipe for busywork and managers excessively looking over the shoulders of ICs. The result potentially being even less productivity.
My theory was that sending all the managers home opened their schedules considerably and so they coped with the emptiness by generating new work.
Suddenly when starting WFH the management required detailed time tracking and summaries of each day.
Somehow tracking productivity was not seen as neccessary when we were all sitting in a downtown office scrolling through Reddit with our headphones on, but it became a top priority when we started doing the same thing from home.