It's always interesting to see how a topic/question can metamorphose into a tit-4-tat playground (notr that it happens 100% of the time).
SoSo, Can - salient thoughts. Some expats come here to upgrade on their lifestyle - that may seem natural for them. Others come here on a "plateau" lifestyle ie roughly the same standard of living. And their are various others.
All i can say is that it would be pleasant to live on a 12k/month package. 
Ciao
'loper