Socialism bolts out of the starting gate with 3 incorrect assumptions. Socialists don't understand about the inherent wisdom of a capitalism, which makes an incalculable amount of distinct localized decisions far more accurately than any group of elitist bureaucratic central planners. Socialism hopes and assumes that people will act with something other than their own interests in mind. If the do-gooders had a better understanding of human nature, they'd understand that people have to be appropriately motivated. Socialists refuse to understand the greater benefit to society of invested money as compared to government revenues.
This is not to say that there isn't need for unemployment insurance, social security and other programs. But, when government grows and gains power, we must push back against that expansion.