The Singapore system of meritocracy does not link any person's
record to their family/relatives/parents...
We do not practice a class system.
There'll be security clearance checks when considering people's
postings to certain units. While the method of assessment is
obviously classified, it pertains mainly to whether you're in
danger of compromising Singapore's national security to foreign
powers, etc. (ie. it checks your family background for potential
links to groups/people overseas).
Once again, your future is your own. Do not be unduly afraid or
bothered. Nowhere in the govt system do they check on who your
parents/relatives are and affect your future.