Who is the real kingmaker?

When Chok Tong was made the PM, everyone was clear who put him there. No
one has any doubt as to who called the shot, who decided who it should
be. When Chok Tong became the PM, he started to groom Hsien Loong to be
the PM. It took him 20 years to do the grooming.
 
Then one fine day, or one fine evening, Wong Kan Seng invited a few
ministers for a makan. And in that meeting, not sure if