How does the social ownership of means of production even relate to what we are talking about? Or are you referring to social policies in general? In which case there are multiple models of market-based socialism, in which social benefits (public healthcare, public education, public transport, government-subsidized housing) are used to boost individuals' purchasing power (they are healthy, they can work better jobs, they can be more flexible with where they live) and inject that money into the economy by keeping a happy, healthy and educated population.