Possible conspiracy theories:
1) SMRT taxi revised their fares a couple of days
ago, and according to news, business went down as fewer people are
willing to take taxis.
And coincidentally, Circle line and North-South line are
operated by SMRT, and they just happen to fail at peak hours, after
the taxi fare hike. And suddenly the taxi business is booming, with
people being forced to take taxi, with the mrt service
disruption.
2) Fines are not enough for SMRT to wake up their
idea. SBS was fined $700 and SMRT $300 for service quality breach
in 2010 by the Public Transport Council (PTC).
They seem to have not learn their lesson, and the $300 fine
really is a joke in light of what happened in the past 3 days.
3) Alstom is the manufacturer of train signal relay systems. It
was involved in China's deadly high-speed train crash in
Wenzhou, after its signal relays failed.
The circle line system supplier happens to be Alstom too. Is
there something wrong with Alstom's products?