No.. by your own logic you put in concrete the lower wages by accepting the job. I have no problem with that. You accepted a job for wages you were happy with. Now you wish to deny that right to others.
So the "slide" in pay started with the A-scalers... re-inforced by people like yourself. Why direct your anger at those still to come?
So should China / Hong-Kong allow non-Chinese to continue to work there or should they dissolve the Chinese equivalent of the 457 Visa? What would you say to a Chinese man who says that you have increased the supply of pilots to Cathay and decreased the wages (especially given the B-scale you accepted). What's the difference?