SS Gruppenführer (lieutenant general) Felix Steiner, mastermind of the Kiev offensive in Russia, Rhodes scholar and tactical genius, immediately ordered every available SS and army soldier onto trucks. He gathered a relief force composed of the remnants of the Nordland , Nederland , Wiking , Prinz Eugen and Wallonien divisions and elements of the Reichsführer-SS . The total strength of the reinforcements was about 26,000 men, including 24 tanks, 15 tank destroyers, and dozens of halftracks and trucks. Those who could not find transportation had to travel the 140 miles to the front on foot, since the rail line had been destroyed.
I think you should go back to your economy 101 class. Food and clothing are resources. I don't believe humanity currently has the wisdom to find an alternative. But blinkered viewpoints like yours (trade is good and the only way) will mean an answer is never forthcoming. Other peoples ideas may well be wrong but at least they are looking for a solution. Is it naive to hope for a better world. "some benevolent faction can be entrusted to oversee & manage everyone’s gifts to society". That would be the dictatorial capitalistic viewpoint you quoted there which is what I'm saying needs to change. Do I have the answer? No.