I could never work out why some employers could not cope with flexible working hours - which meant that the "morning people" would happily be in and productive by 8am, and those who could not get up early could provide cover until gone 6pm. Similarly, lunch doesn't have to be more than 1/2 hour.
Combine all that, and you've always got people able to cope with phone calls (for instance) from some different time zones.
Not too hard to turn that into workable 4 day weeks.
Result, happier, and more productive, people.