I think the PAP was kicked out of the Socialist International in the 1970s, for whatever that is worth.
Meant I writer formerly, but there's an argument to be made that the PAP is a socialist party of the cold war post-colonial tradition with the emphasis of using government intervention in the economy as well social engineering to mordenize society. The rejection of a welfare state and disinterest in redistribution doesn't detract from that.
was there a party anywhere in the world that didn't use government intervention in the economy or modernizing social engineering? That describes the mission of most governments postwar.
PAP in the 80s specifically framed themselves against the post colonial socialists, as a new, better way to progress society. Very different from how they were in the 60s.