The same folks who were instructing in the military and the usual suspects
UAV's are still hobby type stuff, even the military stuff worth buzzillions of dollars is limited.
Same people that train a lot now, instructors who have just got their licence
Not all Heli pilots come from mustering backgrounds, funnily enough the "Must work for peanuts 14 hours a day make a man outer yoo sunny" attitude of most mustering outfits isn't held in high regard in some circles.
It won't dry up, while ever mummy and daddy are willing to pay big bucks for little Jimmy to become a "Captain". With the way things have been progressing in GA the period working for nothing or actually paying to work to get experience is getting right up to feeder airlines with people (Or their folks) paying to crew there won't be any shortage of patsy's. Only thing is in a few years there will be a pimply faced kid sitting in the left seat as well as the right. It's a wonder we haven't heard of the "Skill shortage" from major airline players with talk of imported labour (Read cheaper to employ) to cover the shortfall like the mining sector.
It's unbelievable that somebody sitting in the right seat (Or left seat of the likes of a Dash 8) is only on much the same money as a capital city cab driver.