I think the reason that it's not happening in this industry dl_88 is there are simply too many younger guys who still see this job as something that it once used to be, i.e., well paid, glamorous, great time off, jet set lifestyle etc., etc.
No surveyor, accountant or estate agent, for example, would be prepared to fork out the amounts of money towards his/her career that pilots do & yet in all three of the mentioned jobs you can earn far more than a pilot & be at home with the family, not staying in the poorest rooms that the hotels would never give to a 'paying' guest, working on the back of the clock whilst being away from your loved ones on ever tighter schedules
The authorities don't regulate against it because they can't. If a person has the requisite license, hours & ratings to sit in the right seat then what can they do?