The economy really is a zero-sum game - it's just that some of the costs are not recognized: Pollution, diminishment of fixed resources, economic disparities. Rising "GDP", stock markets, etc., are false measures of prosperity. The quality of life for much of the world has improved, it is true, but there are costs borne by others that we do not take into account - the squalid conditions in the poorer regions of the world, extinction of species, population migration, war and famine. There will come a reckoning. Unfortunately, as always, the elites will avoid the brunt of that reckoning, and a disproportionate share will fall on those with the least resources.