This is just my perspective as a parent, but I think the underlying premise is just fine, thanks. My daughter will have her entire life to learn how to deal with inequality by simple dint of being American. I don't need a playroom to teach her that particular lesson. Besides, there are outside forces to consider...if I pay for my child to have access to an after-school playroom, I have a right to expect her not to be unnecessarily or arbitrarily excluded from play. Again, just my perspective.
As I noted in my other comment, I think you can question the teachers' methods, certainly.
Ahhh, I see where you're coming from. I'm really interested in the socio-economic aspects of this, and the article was written in a way that prompted thought from that angle. Since I don't have kids and the concerns that go with them, I took that line of thought and ran with it.
I don't deny that the playroom might not be a good place to be doing socio-economic experiments. But since the article didn't seem to take that view, I'm interested in the discussion of the experiment. The question of whether they should have been performing the experiment is not a big deal to me.
I think you'll find it hard to find a more representative microcosm of what an unfettered capitalist society would look like than that of an unsupervised classroom...
As I noted in my other comment, I think you can question the teachers' methods, certainly.