Dear Barracuda,
As long as Mr. Ngiam does not cross that line, I don't think he
will get into trouble. He knows about this, of course.
PAP is intolerable of people who used to be in the system but
later, turn their head and bite the hands that feed them. JBJ is
one of them. Francis Seow and Tang Liang Hong are the ones that
followed that fatal footsteps.
What Mr. Ngiam has revealed so far, is fair comment. He has become
the "whistle blower" standing on that little fine line. But as far
as he does not cross that fine line, he should be ok.
BTW, why should you think a good person like Mr. Ngiam should get
into trouble? 
Goh Meng Seng