Larger, continental-sized or resource-rich countries like China, Australia and New Zealand can shut their doors and minimise the flow of people but Singapore cannot.
"They are able to keep things going with their own resources and people, and sustain a living with their own domestic demand. But Singapore is in a completely different position. We are a little red dot fully plugged into the world. Trade and travel are our lifeblood; they are existential issues. They are how, as a country, we earn a living and, remain relevant to the world."