[Oyk]

help some to escape faster when sg in trouble,
help foreign interferences, more fractions.
help relocate of funds faster.

Well said. 

You pointed out serious loopholes of dual citizenship where arbitrage literally happens on not just an investment portfolio but the loyalty and rootedness of so-called citizens who at the first wind of trouble will pack up and leave.

And from the window seat of the plane, they looks down with a smirk and sneer as if to say, good luck to you man, moi ain't staying

Such fair weather dual citizens are even worse that a Bangla who does road works.