Does Kibbutz Life Really Work?

This is not an opinion question. I am looking for facts about life on a Kibbutz. Kibbutzes are supposed places of true communal living where all do for the community without need for money. Does this work 100%? Are they really 100% self-sufficient, including today’s expectations when it comes to modern medical practices?

(If you can, please indicate how timely your knowledge or experience is.)

Wikipedia is your friend. Try their article on it:

Oversimplified short version: Kibbutz life was a great experiment in socialist economy which lasted many decades, but has pretty much given up and gone capitalist.

Unfortunately Jinx has a very limited internet without Google or Wikipedia, in fact it seems the SDMB is about the only place to bring his never-before-asked questions.