its like a bad breakup. Singapore and Malaysia were married, got into a huge fight, separated, and after living happily as neighbors for 50 years you want them to make a deal to cohabitate again?
It's funny to look at the history. When Singapore separated from Malaysia, many people thought that Singapore wouldn't be able to survive as an independent nation island state, with no natural resources. Today Singapore has the last laugh; they're the regional economic superpower.