Also, keep in mind that the minimum monthly salary for the (230,000) Indonesian maids in Malaysia is 900 MYR (about 200 USD). (And from my experience in HK that's also the median and mean salary...)
So, they were basically offering half a month's salary. Imagine what you would get anyone to do for, say, 1000 USD cash.
http://news.asiaone.com/news/malaysia/indonesia-raises-minim...