I think the “us vs them” mentality is too strong here. Don’t you think these billionaires are just as against each other (if not more so) than against the common man?
Read about Fordlandia. It's hard to measure the economic impact of Ford's obsessions on Detroit.
> us vs them
I'm not sure where you got that sense. Capitalist societies tend to create log-normal distributions of wealth. There's no threshold where you can say one person is "us" and the next on the curve is "them".