I don't really have a problem with paying more for an out of state license. I think Colorado(for example) is excessive but, If I chose to hunt there, I know I'll be paying more and do it.
I do think that with some of the people that think that non-residents should not be allowed to hunt in thier state. (I think you will find this to be the case in some states like Kenntucky. Certainly not all Kentuckyins) I think that they don't realize that some of the land in there state is federally owned. IMO is also owned by all US citizens and therfore I think everyone that hunts those lands should pay the same amount.