as I understand from some friends flying there,most of the FOs that get that salary are inexperienced,no more that 2-300 hrs TT .Parc pilots,of course get more money,but this is only temporary,untill they train their own pilots.Except of course if they won't leave also,after getting some decent hrs.
These days,it can be dificult to raise your jet experience,so maybe this salary won't be so low for some 22 yrs young pilots.
When they'll be 25 with,maybe 2-3000 hrs,they'll probably think different.