That’s extremely silly. What left-wing rag did you hear about this “runaway wealth” effect in? Ask some lottery winners and Hollywood stars about that one. There have been plenty who made millions and lost it all due to poor management. In a capitalist society, your class is what you make of it. New people become millionaires every day. You’re not stuck anywhere and there is no such thing as a “wealth effect” that puts you in a lower class. If anything, rich people help give poor people a chance at upward mobility by investing their money and making startup capital available to entrepreneurs.
"The bottom line: 29 million, or 0.6% of those with any actual assets under their name, own $87.4 trillion, or 39.3% of all global assets."
These assets don't do a thing for those on the lower rungs of society.