You make inequality out as the result of purely economic factors, when it is as much the result of political decisions. If congress passes a tax cut for the top 1%, that increases inequality, not because some group has suddenly "found a way to farm more efficiently" or discovered a cure to Alzheimer's, but because we decided it that way.

And as matthewmacleod has stated, you have constructed a complete straw man for someone against inequality. The inequality movement doesn't believe in destroying productive resources. The idea behind redistribution (e.g. taxing the rich and giving it – possibly through increased social spending – to the poor) is to make up for what is seen as an unfair rewarding of wealth and inequality of opportunity. And before you say that this results in the same thing as destroying resources because it drags the economy, I invite you to look into the research being done on the negative economic effects of inequality, not to mention its effect on society as a whole.