It absolutely is. Western economies have been growing at about 0-4% percent yearly over the last few decades. That means if somebody's wealth grows at a faster

It absolutely is. Western economies have been growing at about 0-4% percent yearly over the last few decades. That means if somebody's wealth grows at a faster rate the money has to come from somebody else. If the US was suddenly full of people like Bezos or Gates I don't think the economy would grow much faster. They would just fight for the same piece of the pie.