This is indeed the crux of the matter as to Sustainable Development! As we all agree, it is a morality and ethical issue and thus NOT a technological nor economic one. Therefore, I propose to progressively "equalize" the incomes of all by bringing the income of those who have and the one of those who have not within a reasonable interval (e.g., K$ 8-12!). This should happen while working/adopting better Well Being indicators to be hopefully accepted by all for the benefit of all including Mother Ship Earth, for its services are also limited, and we have to live within its limited capacity! May we find the wisdom in us to make these vital moves, for we could be well beyond the Rubicon!