The current Group B4 ALPA EVP and former MEC Vice Chair never sponged off our dues. He did a great job helping the AirTran pilots secure a new CBA with $40 million/yr in gains and a much improved reserve system (pilots in the top 100 now bid reserve if that tells you something).
While we disagree tremendously on SLI issues, I never saw him as a union slacker. There were individuals who milked the system as MEC and MEC Committee members, but he wasn't one of them.
In reality, very few union volunteers actually bilk the system. Because there's not much to be bilked. The only real advantages to taking on many times the workload of a line pilot is spending slightly more nights in your own bed and having the occasional free meal. If anyone thinks that that is worth it, he's a moron. People do union work for other reasons. Not because it's such a great deal. Having done it, I think you would agree. Being a full time union volunteer is a crappy job.
I do agree though he should have found time to fly at least a 2 or 3 day trip once a month. Nothing helps union credibility more than pilots seeing their union officers in the trenches once and a while.
Those $40 million in yearly improvements (I think it was actually much higher, BTW ) wouldn't have come to be if the people responsible for achieving them were more focused on appearances than on results.