I think the other part of what he's saying is that if they don't already know whether they have "the right people", it's because they've got mediocre management

I think the other part of what he's saying is that if they don't already know whether they have "the right people", it's because they've got mediocre management that has allowed them to skate by without setting concrete goals and building a culture of achievement. I get that metrics don't always work well, and they may be harder to enforce for people you don't see day-in and day-out, but there's nothing stopping them from setting a goal of "complete work on X by day Y", and hold people to that, regardless of whether they're in the office or at home.