There are many more non billionaires than billionaires. There are some 750ish billionaires in the US.
Median American has a net worth of about 200k. So, 5,000 median Americans gets you about a billion.
Divide the American population (~333 million) and lo and behold, worth about 66,666 billionaires.
So, in other words, blaming billionaires is easy but really…
You’re the one who wanted to dismantle the banks. Being ignorant of how they enable development isn’t a position worthy of respect.