A man holds up a placard during the 'Return Our CPF' protest at the Speakers' Corner at Hong Lim Park in Singapore.

Singapore is synonymous with efficiency and order but rising discontent sparked a recent wave of protests, raising questions about social stability in the tightly controlled city-state.

The past year and a half saw numerous public rallies on issues ranging from immigration policies to a lack of transparency in the state-run pension system – marking a departure from the days when citizens held back from publicly questioning, let alone criticizing, the government.