To me is as unethical as people working for peanuts.
not only they work for peanuts, but some pilots are forced to leave their job.
I have met some pilots, who recently told me that if they don't make enough money after 3 months, they will be forced to leave their flying job considering they have 2-3 kids at home to feed (some companies pay you 1500 euro/month and you must pay your TR).
well, if some pilots love so much this job and be paid nothing, take my place.