Sorry to hear about the misadventure in your neighbourhood Tainted.
Yes it is disturbing ... and yes, it is very very sad that Singaporeans are like that. I'm not sure what are the main causative factors, because it's better and yet worse in other countries, in different ways, but in Singapore, basically it's every man for himself. Lovely, gracious, warm and friendly country we live in.
Having said that, Singaporeans nowadays have so little first-hand knowledge and experience in first-aid matters that essentially, if you're lying there bleeding to death on the road, or stop breathing, chances are no one would know what to do.
Not only are we this incapacitated, but guess what? No one wants to even talk about it. I'll wager a bet that even here in this thread ... just observe how quickly all this will 'dissappear'.
I don't know if this is any consolation, but at least he died quickly. It could have been a lifetime of suffering mentally and physically if he were crippled and/or brain damaged.