What did independence mean for Singapore?
The changes/problems that Singapore went through after Independence
Singapore also faced challenges of upgrading industries to higher-technologies in order to compete with its neighbours which were selling the same things at a lower price.
One of the most major issues at that time was Singapore's defense. After Independence, the British were still defending Singapore but has announced that they would be withdrawing by 1971. Without British defense after 1971, Singapore would be defenseless thus this became a major issue to Singapore.
The system has been defended by the PAP because the system encourages representation of the minority races by requiring a minority candidate in group representation constituencies which however increases the difficulty of the opposition parties being able to gain a seat.