If You haven't worked under PBS, find someone who has and ask them about it. You'll find a universal preference for our current FedEx system over PBS and an attitude as expressed by those on this board that have worked under both that this should be a non starter, period.
PBS presents such a destruction to our QOL, Esp. To anyone under 50%, that no amount of money or incentive would allow me to vote for a contract with it in it.