Simon Lee is a bastard, according to Poolman (Comfort cabbie). 2 reasons:
1. He is harsh on taxi drivers. Their fate is completely in his hands if they kena complaint.
2. He has no qualms of killing his innocent children. They did nothing wrong, yet they have to die with him.
It seems one cabbie lent him a large sum of money because even the ah longs were reluctant to do so. I wouldn't be surprised if he requested the loan in return for not sacking the driver, who most likely kena complaint.