"Very developed". That's like Colonialism 101.
Obviously, it's easier to develop small nations but that's irrelevant. You said influential. Define influential.
China, Japan, South Korea, Malaysia or nearly any bigger country in that region can wipe the floor with them in a matter of hours or days if push comes to shove. And in all my life, I have never cared a single bit for Singapore or Singaporeans. So, how exactly are they influential? Just because it has written Made in Singapore on the back of someone's laptop adapter or what?
Hater. What Singapore ever do to you?