Well, I think understanding a problem is distinct from solving a problem. You have to do the first before you can begin doing the second. And critics are trying to do the first, first. However, there are many non-market economic systems which have been used in the past, all of which seem to have worked quite well. I think we could learn from them: - Substantivist Economic Theory
- Reciprocitic Economies
- Gift Economies
- The Potlatch
- The Vertical Archipelago
- Syndicalism And that's just from a quick browse though Wikipedia. Cultural anthropologists and historians could probably describe many more non-market systems, any of which could have lessons for us.Unless the critics of capitalism propose a viable realistic alternative that does not contain equivalent or even worse problems, I dont think they have much of a point.