From what I can see online, the average compensation that an au-pair in The Netherlands receives is 300 euro per month, with living expenses being covered by the family. There is no minimum wage requirement for au-pairs like in the UK or the US.
The added cost of having an additional person to provide room and food for way exceeds that €300/month. Especially, when taking into consideration that you might have to extend/renovate the house to lodge another person. Adding an extra bedroom and possibly bathroom is not cheap.
So in reality you’re paying for their food, electricity and heat, letting them rent a room for free, and allowing them the use of the other facilities in your home and on top of that you’re giving them a spending allowance of 300 euro.
A semi-skilled English-speaking customer service agent in PH makes less than $700 a month to put this into perspective.
Working abroad is a totally reasonable proposition compared to working in the Philippines.