One could also argue that the same rigged system some people claim to be getting screwed by is also the one employing them and their limited license.
Is it something about the pin itself that makes an ATB mariner exceptional enough to qualify for an unlimited upgrade? I have to agree with seacap@large. My limited ticket does not deserve that just because I push around a 30,000 bbl barge whose gross tonnage when combined with the boat exceeds 1600 gross tons.