So, you believe in politics by envy hum? The wealth gap isn't because of billionaires, it's because of government. More government means less wealth for the average person. It also tends to make the very rich richer. It favors big corporations and companies heavily.
People like Steve Jobs and companies like Apple gave us revolutionary products that have improved the lives of billions. Jeff Bezos and Amazon have likewise improved people's lives by making an astounding number of goods available wherever you live. Earlier billionaires (by today's standards) like Carnegie and Rockefeller not only built business empires that allowed the US to become an economic powerhouse, they also in their later years gave the public things like public libraries and institutions of higher education that improved lives of millions on their own.
You want to castigate them for their success, and like that fool Marx, strip them of their wealth to squander it in penny packets on nothing in particular. There's a reason Socialist countries are dirt poor and backwards. They don't generate wealth in anywhere near as great as Capitalist societies do.
So, Leftists like you, employ the politics of envy to create strife between various economic classes in a society to bring the whole down into equally shared misery and poverty. I'll pass.