I have the opportunity to watch a wide range of instruction competencies in Summit and Eagle counties in CO.
You see a private lesson where the instructor knows why he is there and is animate, interested and (at least apparently) fun being had on both sides of the process.
There are group lessons where the instructor has good control of the class and the class seems to be paying attention. Some learning may or may not be going on.
On the extreme far end you have a uniformed guy leading a bunch of vicitims down the trail with nothing on his mind but contemplating when he can get to the park.
If you had any idea that you might learn something when you signed up, you would probably be more inclined to.
There is also the 'buddy' factor. We've all seen it, where a buddy says 'its easy, I'll show you' and proceeds to take his never ever to the summit and teach him to fall like a leaf. Or wedge. It works or not, they get out and have experienced a snow sport. Either they never try again because they never had a chance from the beginning and hate it or they keep going at it and days or years later might manange a real turn or two because the could do it without an instructor the first time.
Definitely the ski resorts have got to up the ante in providing a consistently high level of instruction. I think this would make the most difference. Warm bodies do not always make good instructors. Be selective in hiring.
On another track, my girlfriend was a never ever and bought a never ever pass from Vail Resorts that provided three lessons. As I tele, she wanted to tele too, so bought tele gear. I had given her a few lessons and she was a competent wedge with an affinity to parallel. Her three lessons consisted of nothing more than wedging. Despite demonstrating a mastery of the wedge and asking about parallel turns she was forced to continue to wedge. She was also lambasted for being on tele gear in an alpine lesson, but that's another story.
Her instructor had no interest in teaching her anything except what he perceived as what a never ever lesson should provide.
What it boils down to is if the instructors don't care and take an interest, the public will see that and not take lessons. I appreciate that the true pros out there understand this, take pride in their job and provide a good learning experience. The resorts hire nearly every Tom, Dick and Mary that show up looking for a comp pass at the beginning of the season so they get a lot of crappy instructors, wearing the uniform, looking like disinterested neer-do-wells, representing the snow sport school in a massively negative fashion.