Anybody who says that doesn't understand life there. If you work in a semi professional and up setting you need to be immaculate in your grooming and appearance. Traffic and hours of work are horrendous so you get home late more often then not. You also have to work Saturdays and will have family/religious obligations on Sundays. There is no free time for most serious, urban people. The low wages for domestic workers maintain a way of life for people that have worked very hard to get where they are.
Human adapt to any situations. What you just described could be said anywhere. Urban professionals are professionals anywhere in the world and they don't have much free time. I know people who work 60 hours a week and look immaculate as well in the US, yet they don't have full time domestic workers.
I have myself a cleaning lady ($ 25 /hour :bored

, so she works once a week and deep clean the house and the rest (O THE HORROR) I do it myself. Heck, my kids even clean their rooms (call child services !

). And, yes, I get home rather late and and I am out of the house by 8 am in suit, make up and high heels :smoke:
Low wages domestic worker is not a matter of maintaining of lifestyle, it is a reflection of a developing economy.
If the going rate is 10 k a month, that is what they should get. The same way, I pay my after school sitter $15/hr, because that is the prevailing rate in MY area. Similarly, I have had someone who work for me while I am in the DR, I don't pay her as much because I can.