It may not be SIA that you are considering but the Chinese generally and Singaporeans in particular take filial responsibility very seriously, (it is within Singaporean law for parents to sue their children for non support and an order for maintenance being made against the children).
In one instance where I know of an individual being able to negotiate the bond he was first given a year off without pay but kept his job, then, when that didn't work out, he was able to negotiate a very reasonable departure, an agreed sum to be paid over a period of years and the Bank Bond was released without deduction. What no company likes is someone who justs jumps ship and makes no effort to settle their contractual debts.