There are two issues here. First, the government makes its own laws and rules and is also the sole "Banker" in CPF instead of merely legislating the laws and rules but leaving to the private sector like banks and insurance companies to administer CPF funds. It is thus a monopolistic "money collector" bound on by its own rules and laws it can set, change and interpret as it sees fit. Second, if a contributor leaves the country for good he is morally entitled to get his "money" back. Should he come back later for another job with or with another employer it is a different contract with all the required immigration laws that have to be complied with. This is more of a human and moral entitlement. It my surprise you that Hong Kong has recently been voted the best city in the world to live in, ahead of Amsterdam, Osaka, Sydney, and Toronto, using an award winning voting system that looks more at "spatial characteristics". Incidentally, here the government legislates laws on CPF but it plays no role in collecting any CPF contributions.