But wage slavery, while bad, isn't slavery still. In slavery proper, the option of walking away straight up doesn't exist. In fact, in extreme cases, even the option of dying might not be available.
I suppose you are referring to the Marxist meaning, technically (at least as far as I know) original, meaning. First, Marxist economics are considered heterodoxical nowadays. Second, it is still about "destitution", in the sense that the working class is formally destitute of the means of production, requiring to sell their labor to have access to it. If that's the case, I hope you notice that weakens your point of "wage slavery being a form of slavery", as you lose the analogy of proper material conditions.
cause it‘s a bitter sweet symphony that‘s life…