I believe cadet schemes can be a good idea as long as the initial screening process is any good. I am sure that there are excellent cadets and some questionable ones, being a mere f/o I have yet to fly with any but my company seems to enjoy taking them on. I also feel that being a flying instructor is priceless and allows the chance to learn pilot monitoring skills. However, I also feel that SOME, not all, instructors can get into bad habbits which COULD possibly be seen by airlines as being a SMALL problem, hence cadets. I do feel though that having high hours in a single burning holes in the sky could have an adverse affects on your cv becuase it would be easy to get into a position where bad habbits start to occur and there is a very limited amount of experience which can be gained in a single that has any relationship to the airlines.