In 1980 I worked for Gulf Air in BAH as a licensed engineer. There were about 50 engineers there. Four were Indian, and five from the rest of the world. The other 41 were British. So the salary and allowances were pitched to entice engineers to move from the UK. I was there for 11 years and the ratios did not change much. We had Local Gulf Arab trainees, but when they got there licences, they went off to be managers.
Last month I was in Doha, on training with Qatar Airways. I was in the hangar, and out on the line.
I was there for 10 days and saw 2 Europeans in MCC, one on the line, and two in the hangar. All the engineers are Asian, mainly Indians, but a lot from the Philippines as well. This means that the pay and allowances are set to attract Asians.