As well as Hong Kong, Singapore is also at risk of governmental intervention. If you search on the Internet about how democratic Singapore is, you will find that the country is ranked at the lowest in developed countries. Congress of the country has been dominated by People's Action Party since foundation of the country. And, the election system is designed for the party to get more seats in congress.
But, considering that Hong Kong will lose its points proportional to increasing effects from Mainland China, Singapore will definitely be the freest economy nation in the future.