re: The food rationing system in communist Cuba has collapsed

The common denominator is always ummm..... Human nature.

That is why Capitalism works so well. Greed is trackable and predictable. Capitalism also has a level of framework more embodied by the public as a whole as opposed to a select few where power is concentrated.

That is not to say we dont have our own problems, we do, but it is much more predictable, trackable and MUCH easier to deal with at the individual level.