Much have been discussed on this topic, the arbitrary figure of 10 million is reached top down by the PAP based on optimal economic sustainability supported by an achievable land density. Singaporeans have reacted, like Roy Ngerng, providing the bottom up sentiment. What is left is now the skill to balance, the political skill to achieve equilibrium. Over the last decade, PAP has pushed the limits of letting foreigners in, failing to balance the infrastructure needs and social tolerance. As such, it has resulted in a heavy backlash.