The IFBB needs and wants more judges. Do you think that the current group of pro judges (I don't know the exact number, but there are a lot fewer than people think) wants to have to judge so many events a year? I don't know how many of you travel by air on a frequent basis, but it's a real pain in the butt. In addition to travel hassles, there's also the time away from their lives and families. Sure, they are virtual gods at the events, but at what cost? It's not that they don't love what they do - they do, but the hours are long, and the tangible rewards aren't that great. And then on top of that, no matter what they do, there are thousands of attacks about what a crap job they did at such-n-such show. I'm not blameless in this - over the last decade, I've given them plenty of criticism...but tried to offer a fair amount of praise as well, because I don't envy their jobs one bit.
Like Chick said, these men and women do it purely for the love of bodybuilding.