What I had observed and concurred by like-minded friends about peidu mamas is that most of them who sought to take a chance on making it through the Singapore education system for their children are not financially equipped for the full run.
But unbeknownst to the Singaporeans, they did not come without a plan that had been formed by tapping the networking information grapevine in their home country.
They know of the PAPs desire for more PRC immigrants. They know that they can work on the sly with the one eye closing on the part of the Singapore Government. Those with better looks can find a Singapore male married or otherwise to have an arrangement of convenience in exchange for a stable long term but not indefinite sexual relationship. These men will provide a roof over their heads. Those less qualified in the CFM category work in the wet markets, coffeeshops and as shop assistants, massage parlours, etc, etc. Some go into the more risky trade of KTVs or prostitution.
Their kids know or will grow up to understand. They may be suffering the taunts of the locals. When they grow up and sink their roots here for the long haul, they will become part of the Government machinery and it will be payback time!