Female employee pregnant? Feel free to pre-emptively fire her, as long as it is not 6 months before the baby is due. (Even the 6 months is a relatively new ruling, used to be ok till the baby pops).
Found a cheaper employee? Feel free to fire the existing one. No reasons need to be given. Employment at will, they call it.
As you may imagine, the employees reciprocates this regime by displaying little loyalty. You only need the smallest pay rise to prise away a rival's employee.
So good luck starting a business here. There is a reason why Singapore is dominated by MNCs and government owned conglomerates while small enterprises have unnaturally high failure rate, despite being so startup friendly, on paper.