A slightly different perspective in support.
The reason why the original Labour Party ideas were so apt and correct was because they were solutions drawn up by the very people faced with the problems. People who lived the issues as part of their lives not as some hypothetical philosophical construct that they once read a good essay about.
If a future government wants to find solutions that really work they need to seek the answers from those directly concerned. Let the economists fix the economy. Let the socialists fix society. Let government broker the competing priorites in between.
It is why the governments of the past succeeded where the governments of recent times have failed.