If everyone had more money to spend on food, then food would be more expensive. People having more money doesn't generate value, it just drives inflation.

But the quote you are replying to makes no sense anyway. It doesn't "cost the economy". This is that same old fallacy that says if the economy has "grown" and there's more bits of paper moving around that we are somehow better off. If anything a bigger economy just means we spend too much of our finite lives trying to make sure others don't get more than we do. It doesn't correlate to a better way of life at all.