You do not need rocket science to deduce the reason as to why so many qualified and educated foreigners are "encouraged" to work and settle here as citizens and PRs.
The paramount reason is the extremely low birth rate and the increase in the number of aged Singaporeans coupled with the increase in the number of singles and divorcees here.
These younger foreigners will be replacement and will form a significant backbone to "support" and equalise the rapidly aging population here.
As it is, there are only 2.3 million citizens here and 750,000 of them are already senior citizens.:(