Hi Mr. Tan,
I came across this term, "Ponzi Demography" in some blogs with links to the original article. Thought you might be interested to have a read.
"According to Ponzi demography, population growth — through natural increase and immigration — means more people leading to increased demands for goods and services, more material consumption, more borrowing, more on credit and of course more profits. Everything seems fantastic for a while — but like all Ponzi schemes, Ponzi demography is unsustainable."