They’re not necessarily socialist. The post war welfare state was a result of the Beveridge report, written by a Liberal peer, and would have been implemented by whichever party had won the post war election. The post war consensus included all of those points raised by LBJ, and was supported by Tory and Labour governments alike for decades until diluted by neoliberalism, (itself in turn supported by Tory and Labour governments alike).
A “dictionary definition” of socialism relying on just those policies listed would not be a very good one.