PAP is in a sure-lose situation :

there's low birth-rate, without foreigners our economy stagnates and in a decade or so become just like Japan's stagflation.

But letting foreigners in leads to Singaporeans (especially the lower income ones) complaining and very likely voting against them in the upcoming election.

However if PAP changes policy and stops importing foreign talents, our economy tanks and government is again at fault.

imagine if you were an opposition member and got voted in, what do you think you can do to solve this predicament?