There is exploitation under all systems that involve more than 1 human being. Capitalism is just more overt about it. Classless society is not possible, human nature does not allow for it. Humans are smart monkeys, we did not evolve to be members of tribes of thousands, let alone millions or billions. Our brains simply aren’t wired that way. As much as I’d love to live in some wonderful utopia where everyone is equal, even when two people are equal today they still fight each other.