I'm not sure that making everyone take their turn at the unglamorous job of teaching never-evers is such a good thing either since it does not allow instructors to develop expertise or insure that the students recieve qualified instruction.
I know what you mean about promoting kids to levels. I once was handed a group of supposed level 7 kids in the kids ski school. The weekly class group was the usual property of a nice guy who probably wasn't much more than a level 7 himself. It wasn't until later that I figured out that the reason I was given this group for that day was that corporate execs were visiting the area that day and looking over the ski teaching. This fellow had his usual sinecure temporarily removed because mgt did not wish to be embarassed. I was told confidently that these kids were level 7s and could ski anywhere on the mountain. Their skill levels as it turned out were the usual thing you can expect to see among kids who've been skiing a lot in ski classes but getting little instruction ie somewhat confident and basically pushing the upper limits of little skill development. Fortunately I did not believe this business about their abilities and resisted the kids begging me to take them down this advanced trail or another until finally I relented and took them down what I consider to be an upper intermediate level slope, wide and fairly uniform pitch, good snow. One kid ended up peeing his pants and another taking his skis off and sliding down on his bum -right in front of a visiting corporate type. We laughed about it and kept it fun but of course it was my responsibility and I should have kept them somewhere below their supposed ability level. Nonetheless it reveals for me what is more or less an open secret ie that much of the ski teaching product sold to the public is a sham. these kids had ski instruction every weekend day all winter and the ski area normally just shoved someone into the teaching spot who would dependably show up and wear a ski school jacket and perhaps not do much else but ski. Ski school mgt knew this but thought their only problem was covering their asses.