As Clive Lewis says (in Solidarity 388) there are many definitions of socialism. That makes it all the more important for socialists to debate ideas.
Lewis says a shift from austerity and neoliberal capitalism to (or a return to) welfare-state capitalism would be a gain for the working class. Indeed, taxing the rich, free education, a NHS, well-funded schools, social housing, higher wages, public services would be real and important improvements, for the working class as opposed to the Tories dark, dystopian future.
However all of these things can only be won, or re-won as a result of class