Most "progressives" who reject capitalism do so in part because they do not trust the bottom-up organic progress and social structure that comes with capitalism. They prefer top-down god-like statist technocratic control.
This is an interesting article contrasting the rejection by liberals and progressives of creationism in the complex systems within nature to their embrace of it in economics and society.
Just as in the natural world, society and the economy is self-organizing, and arises without any sort of central direction or central planning. This is a view that has been put forward by economists and social thinkers such as Frederick Hayek, Adam Smith, David Hume and many others and, like its non-creationist counterpart in the realm of biology, has the advantage of empirical support.
Cool article. I have written on similar thoughts here. Listen closely to about any politician today, liberal, conservative, progressive, etc and you will hear, in almost every statement, a distrust of individual decision-making. Ironically there are many liberal professors out there who will explain to you all evening how termites can build an elaborate mound without any centralized control, but will deny to the death the suggestion that individual humans can build a strong economy and social structure without central control.