Sorry, why would society owe their children? Where does this obligation come from? You're making a leap here that doesn't make sense.

Also, it's not sharing with society that makes people billionaires, it's taking from society. Had all that profit gone to society, they wouldn't be billionaires. Now often (not always) they provide some value to society but that generates that profit, but quite often even that was based on taking from society. They take natural resources to exploit, monopolise a market, exploit workers, etc.