Market pressures aren't fixing it, at least not fast enough to prevent a lot of pain to actual living humans. Yea in the long term it might be fixed, but in the here and now people are hurting. When I was out of college and stuck in retail I had to decide whether I was stealing food or medicine that week or going without, because those jobs don't pay enough to live. I am lucky enough to be talented enough at software to get a job doing it, but you can't expect everyone in the population to have those skills.
Expecting market pressure to take care of everyone is condemning people to die. I agree that the market is more efficient, but that efficiency comes without any sort of humanity. There are people who have no talents that are worth enough in our current economic configuration to earn enough to live at market clearing wages. Should we just let them starve or go homeless because of it?
I also agree that planning a 'right mix' of people does reek of totalitarianism, but the other choice isn't any better.
I don't see how letting the rich choose who gets to live a decent life based on whose most useful to them is any less totalarian when our society is channeling more and more wealth everyday to a small group of people.