"Yes, I can – but without the appalling waste of resources." = When compared to?
As to the beginnings of the welfare state- I think most recognise the influence of people like Lloyd George, prior to the 1st world war, in introducing the principles of a welfare state, in response to a huge social and cultural demand- and in recognition of the popularity of the newly formed Labour Party and its threat to the support base of the Liberals.
These can be regarded as socialist principles, regardless of the name of the party that introduced them. It was the Labour Party of 1945 that introduced measures recommended in the Beveridge report, a massive expansion of the role of the state and redistributive taxation.
So I come back to the OP - Socialist principles are alive and well and thriving in every Western country. Humans have thrived because of our unique ability to co-operate for the common good, itself a socialist principle. Most of us are fortunate not to have lived in an extreme version of a political system, like Ayn Rands Libertarian Capitalism, or the communism of soviet russia.