Give me a reason why you need to label pillars?

Yes, why do you need to meticulously label each pillar at the void deck of blocks of flats?
Once in a while, I would visit an older estate. And in this case a certain HUDC estate in Hougang.
Here, all pillars and even facade of each block has been labelled.
The only reason, I could think of is this.....
Town Council Staff: "Sir, can I help you?"
Concerned Resident: "A car just rammed into the pillars at my block".
Town Council Staff: "Sorry, Sir! I need the pillar number".
Concerned Resident: "Shouting excitedly : PIllars no. C2016 , C2017 and C2018"
Town Council Staff: "Please hold while I check with the structural engineer"...
Concerned Resident: (the upper floor collapsed on him and thank god, his passing was quick"
1 hour later....
Town Council Staff: "Hello? Hello? Are you still there? Bad news, Sir! The structural engineer tell me to tell you... GET THE HELL OUT OF THERE! Such damage means the block will collapse instantly!"