Pillars will fall if Public Works department starts digging a tunnel for Water/Cables/Sewer etc... as the strength of a pillar not only comes from the construction of the pillar but the stability of the ground around it..
unfortunately the news flow is only: "One more pillar fell"
A more proper news flow should investigate the reasons.
The last time the pillars fell it was the PWD which had done some digging close to the pillars which never made it to the news..