Sorry there is a huge causal relationship if not the only reason. Wealth is not relative dollars but purchasing power. In a system where a hat maker and a shoe

Sorry there is a huge causal relationship if not the only reason. Wealth is not relative dollars but purchasing power. In a system where a hat maker and a shoe maker double their production, they respectively see no "wage increase" but they are both twice as rich. Productivity -> more goods/services -> richer society, wages be damned.