Of course Socialism will fail, always has failed, and always will fail. The core components that make it Socialism are the main reasons that CAUSE it to fail. There's no incentive to work, the government either accumulates massive debt, or there are massive taxes, or both, and the collective is made generally poorer. It's not the equal sharing of wealth, it's the equal sharing of misery, because everyone is prevented from succeeding. I have a massive list of nations stupid enough to try Socialism, and have failed. Even the Nordics are making small advances towards capitalism.
Your title also shows you don't know what Neo-Conservatism, Neo-Liberalism, and Capitalism are. Which makes sense, given your OP.