Fernando, to me this sounds a bit like what the WT preaches, an utopia. Some of the technology aspect will probably become true in the future. But the social part of it, is not realistic.
People like to be paid for their job, it’s a question of personal satisfaction, they also like to own their things, even animals want to own their territory.
Science is as good as the men using it, and men are as good as their values. Not all countries are developed to the same level, the same as not all individuals are. Not all individuals have honourable motives. Some just want to take advantage of others. We have a long way to go before we can have a global government that will be good to all. History teach us that governments that have no opposition become tyrannies. Imagine what a global tyranny would be like. What would happen to dissidents? It doesn’t convince me.