A large disparity (real or perceived) between services rendered and remuneration is a problem. Unfortunately, unionization is rarely if ever the right long-term solution IMHO. Wages tend to increase sure, but the quality of the services rendered often times declines, sometimes quite drastically.
I don't think there is a universal answer to this question. Working conditions and responsibilities are vastly different between each mountain/resort and the spectrum of disparity between say a small 'mom and pop' ski hill in the midwest, a medium-sized hill in Pennsylvania and Vail is literally a chasm. Whose job is more difficult, the likely underfunded and understaffed small hill with 300' vertical, but teeming with extreme novices prone to injury/collision/accident or the well funded and likely moderately well staffed Vail team who has to deal with thousands of acres, hazards, avalanches, tree wells, not to mention tens of thousands of skiers on any given day whose ability levels range from a wealthy 45 year old trying skiing for the first time but they were too arrogant to start on the bunny hill to 10 year olds whipping 720s on a steep bump filled tree run which is technically roped off? (can you say run-on sentence haha)
I believe in fair, honest wages depending on the service rendered. For some things, that is $5/hr, for others that is $600/hr. And everything in between. Some ski patrol IMHO, deserve far more than they make, they work extremely hard at what they do, provide a great service and are literally indispensable to their respective mountain. But the flip side of that equation unfortunately exists as well, and there are plenty who do not warrant this same wage or anything close for that matter. Deciding the "who" and the "how much" is obviously the crux of the equation.
If the ski patrol constructs a well-designed presentation regarding their respective value to the mountain and it's customers (Re: $$$$) and this falls on deaf ears, they are unfortunately left with little recourse. Sometimes the answer, although extremely difficult, is to vote with your feet......
My two cents.