That's an achievement for sure... however how many super-low wage workers are there? The auntie who washes the cups and does general cleaning at my office makes $700/month, what sort of living standard can one get on such a salary ?
The problem here is that there is no alternative, people are forced to work in whatever manner they can even if they are old, sick or mentally deranged so the low % unemployment is not a measure of how well Singapore is performing.