No... a big part of the advantage of bibs is the lack of an elastic waist band. Adding suspenders would keep your shorts up better, but you'd still have that annoying waist band which to me eliminates about 90% of the reason to wear bibs. I have seen riders pin their base layer to their shorts though especially for cross races where you are hopping on and off the bike. For some reason, "athletic suspender" sounds like a new peice of male athletic protection.
commuter turned bike mechanic turned commuter (also a Velocity USA employee, but this is my personal account)