my opinion is that they are traied differently, some better trained some differet qaulifications. also i feel something that has to be taken into account is how far that money goes back in the home country. average house price in uk say ,,,,, £150000 average house price in phillipenes ,,,, £20000. i think it is done fairly when you look at it in that respect . but your right ,cost of living is the same for everyone when they are in qatar.