Say Again.. No I did not intend to wind anyone up!
I certianly did not mean to infer that paid instructors are not dedicated at all. I have flown with many and found most to be very good. And I agree with most of what you say about instructors and their job. However, I find most are there for the experience rather than the enjoyment - might just be the few I have flown with recently though. Regardless I certainly think instructors do a fantastic job for the pay and general conditions.
I just dont see the problem with someone volunteering there services for free thats all. If it helps the club/school that's great. Are the schools there to provide jobs for instructors or to provide training for students?