Earlier quoted context omitted.
The CPF sounds pretty clever. It covers a major individual cost and need (retirement, medical, housing) instead of just throwing it into a tax. It makes the government money. This sounds like a win win kind of policy.
To me it sounds like a tax structured in a strange way so it doesn't obviously read as a tax. It's essentially a forced loan to the government at subpar rates. The "tax" is the delta between what the government pays out for the bonds vs what a bond of equivalent risk in the free market would have paid. The magnitude of the investment also probably makes it impractical for anyone but the very wealthy to retire before…
It also robs the individual's freedom to gamble with their retirement funds while expecting/demanding a bailout when shit hits the fan.
In the USA we have thoughtful policies that allow people over a certain amount of wealth invested in key industries to do that.