While I'm not entirely familiar with the inner mechanisms of the
Singapore army, it is not hard to understand where the author's
coming from.
Think about it : in most developed countries, the leaders of the
respective armed forces are schooled in military academies
preparing them for a career in the military (and that includes the
world's leading military force, that of the US) and not one in
another domain, only to be deployed in the military later on.
While one might draw parallels that the likes of Colin Power has
transited from military leadership to a top post in a civilian
administration, it doesn't alter the fact the system, by and large,
trains individuals for that particular field (you don't see top US
generals having been schooled at Harvard and Yale Law School for
instance) - in essence, anyone with ability in a given field can
rise through the ranks to the highest post of a given field in the
US. That, unfortunately, can hardly be said about Singapore - let's
face it, Colin Powell would never have become a general if he'd
been born in Singapore since the posts of generals are reserved
primarily for the academically-inclined who might not have the
slightest nuances/acumen for the military...
To better
get a grasp of what the author is driving at, try imagining having
a Harvard Law School graduate administer treatment to you if you
had cancer... 