It was certainly an efficient organisation Bodd, I think (from memory) something like 20% of the population who worked on the kibbutz were responsible for something like 80% of the Israel's GDP, that's quite an achievement. I lived on one for nine months between 1976-1977, a small one, cotton fields, dairy herd, grapefruit, oranges etc,.
I'd like to think that my 'hard graft' played a strong part in those impressive statistics, truth be told, most of my time was taken up by drinking, shagging, and tending to a small marijuana plantation on the Golan Heights which was sadly discovered and destroyed by an Israeli army patrol.
Going back to your original point, it was possibly the purist and most efficient form of socialism, or communism, much like Aldous Huxley's 'Island', but not without it's faults, and from what I can gather, it's diminishing at an alarming rate as the youngsters are seduced away from it by Capitalism.
On the one hand I feel it's inevitable that the 'kids' will move away from that type of environment to an exciting new world of free markets and capitalism, on the other hand, it makes me quite sad, after all, the kibbutz organisation grew from planting a few oranges and grapefruits to owning their own shipping lines and exporting all over the world, if that's not Capitalism I don't know what is.
What a world of contradictions we live in eh?