Its not really true that military people can be shielded by the
National Security act, especially in S'pore. Otherwise, how else
would Jane's intelligent magazines continue to publish its
findings? Or better yet, how else you know the place even exists?

Its whats going on within the building thats really is a secret,
right? Ha! Did you know that traders are more secretive then the
military? Why else did te CIA, during Clinton's administration,
devote a large analyst resoures into finding out trade secrets. And
knowing a trade secret can sometimes change the events of the
world. 1997, a certain muslim PM accused a U.S businessman for
manipulating the stocks market which he claimed resulted in the
ASIAN crisis. 
Military secrets are meant for the defence of the country &
usually are useless information to the public except for those who
intend to bring harm to the country. 
In S'pore, I believe the military is far more capable in preventing
abuse of information then most countries that I've seen so far.
However, thats not to say that its totally free from abuse because
no military in the world is safe from that 1 bad seed, the mole.

Anyway, S'pore's military spending, with TAX
PAYERs' money, has been nicely documented in magazines
such as Jane's defence mag, etc.