Been re-reading Beer's paper about esoteric boxes. I think this is the best chapter in 'Platform for change'. He talks about the real difficulties for institutional change - and the possibility that those who seek change are actually part of the mechanism of viability of the 'ultrastable' whole.
The improvisation is totally unrelated to any of this. It's meant to be wild and humorous - partly because it's something that's difficult to improvise (you can hear the problems I had!). Its main feature is the strict regulation of the rhythm. Of course this rhythm gives the music its own 'ultrastability' (which I try to break).