No. Most of human history was lived like that. The Spanish & Ukrainian revolutions also show that it can work.
> If everyone is responsible, is anyone?
Everyone is responsible for their own actions.
> No division of labor in your utopia?
Not between decision makers and implementers, no. Other divisions of labor are fine, so long as they're voluntary.
> No mechanism of authority with accountability?
No hierarchical authority, period.
> When I hear things like this, I think
> of Nancy Folbre's critique of the Albert/Hahnel parecon model - it's
> a vision of life as one long student council meeting.
You don't have to go to any meetings if you don't want to.