For me, this is a no-brainer. Free-market is an extremely powerful tool, but Free-market itself does not have heart or any respect for Human Rights whatsoever.
If we want to create societies where Human Rights are respected, Free-market need to be operated under constraints. Yes, those constraints will slow growth and, maybe, some rich people will be less rich, but the other option is Neo-Feudalism and Barbarie.
So, the question is: how much injustice are we willing to tolerate for the sake of growth? Every society has a different answer, but you can easily see different models in Japan, US and Europe.