The feedback ive had from pilots and instructors alike is the 15% odd of people qualified that will never fly will be due to the fact they are totally unemployable, not because of experience. By this i mean due to low qualifications at school, poor flying experience and zillions of attempts to pass exams and flight tests, poor charisma in an interview and generally terrible flying in a sim check.
Im not perfectly sure how and what makes a qualified pilot totally unemployable, but if you work hard and do everythign by the book you'll be fine.
The pilot market is getting better.