Wherever possible, a company would have three workers filling out a shift rather than one. I think there would be productivity effects, though, as noted by ano

Wherever possible, a company would have three workers filling out a shift rather than one. I think there would be productivity effects, though, as noted by another poster. And not everything scales linearly in the necessary manner for this to work (but many things do). One upside, though, is that the number of jobs would drastically increase.