hamada, it looks like we are talking the same talk..you have just proved my words.. why to blame qatar if it happens everywhere?.. and your sample with China proves my statement that $200-250 (besides ALL basic expenses) for the maid is not too little.. as per your words, in China minimum wage has just reached $160, and people have to pay for everything out of this salary: accommodation, food, school for kids, other basic needs..
by the way, I think your sample with Mexicans making peanuts and living without health insurances is not really valid, as most of these mexicans are illegal labours, and this is definitely their choice to get paid peanuts or to go back home. It looks like they prefer to get peanuts, as in their own countries they probably will die.. so.. whose exactly fault is that? And I am sure this type of workers are stuck with some small poor miserable businesses who barely survive by themselves and hardly can make ends meet, let alone paying normal salaries. I doubt that large strong companies would introduce such practice... so it has nothing to do with the "benefits of the elite"..
and your example of 'Turks, Caribbeans and Indians who immigrated to Europe post WWII, how much were they earning versus their Germans and British counterparts' is absolutely out of topic.. it is obviously impossible that post WWII immigrants, who maybe didn't have educational level as per european standards, and probably don't meet high requirements, and who are not local language native speakers, would earn as same amount as 'their Germans and British counterparts'.. but i am sure there are always exceptions.. not everyone is the same..
so again, comparing teacher in a private school making $150-160 (including eventhing) and a maid making NET $200-250, the score is definitely in favor of the second.