I think you gotta put it into perspective, whilst I don't necessarily agree with paying for your own endorsement, I had no problem paying for my initial twin endorsement because I though it would better my career and keep me a bit more competative. As I don't really agree with some guys going and buying hours on a 210 to look better for a prospective employee up north, but hey people do it to get the edge.
Unfortunately my inital twin was about $1400, not $30grand so I do definately see why people would stand their ground.
I'm sure if a 737/a320 Endorsement was $1400 people would still complain on a principals ground but not nearly as much!