I think OP meant that it's OK to be middle class mediocre, nothing especially bad or shameful about it. Being poor is the other extreme of the system - just like good luck and smart decisions can make you rich, bad luck and stupid moves can make you poor. I don't think that anyone argued that society shouldn't reduce the risks and provide a safety net for poor people. Also IMHO for social stability it's important that system slowdowns both of these tendencies, not let people get extremely poor, but also not extremely rich over the night.