I guess it depends upon how much you want your family to travel. At FedEx, we have large numbers of deadheads, and you can accrue plenty of airmiles over the year. I deadhead enough on Delta that I can give my kids gold medallion status, allowing them to get decent seats and be upgraded every now and then on airmiles tickets. We virtually never buy the kids tickets, but use airmiles for them. Since they're so wishy washy about when/if they're flying somewhere, the airmiles allow us to cancel/reschedule their tickets without penalty. As far as my travel goes, I either have FedEx purchase a ticket in conjunction with a trip or I might jumpseat.
Our scheduled deadheads are a real bonus for a commuter. We save FedEx millions of dollars every month by people living all over the world, and we can get confirmed space tickets to start/end our trips to wherever we like. Now if I wanted to take my family on a trip with me, I couldn't, so that is a negative.