I have integrated this into my beginner classes with great success. When the beginning student (low velocity) begins their turn with a conscious effort to "soften" the inside leg (while steering the outside), weight (mass) transfer to the outside ski happens laterally at the pelvis and is a result of the inside ski getting shorter not by purposely standing on the outside ski.
This is good. Most beginners and novices ski too tall and straight to begin with. That doesn't leave much range of motion for lengthening the outside leg! On the other hand, there's lots of room for shortening the inside leg. Also, most beginners and novices need to break out of the instinctive move of bracing on the inside ski to obtain what feels to them like a safe, wide base of support. This habit gets in the way of just about every possible aspect of improving form. You can tell a student to stand strongly on the outside leg. But not only does this flirt with creating proto-stemming habits, it also often doesn't work to break that bracing habit. The fault isn't really a failure to use the outside ski, so telling the student to use the outside ski more misses the mark. Better to go directly to the target and have the student soften the inside ski. This should promote a narrower stance and bringing the skis parallel.