Rich people don't "hoard" the means of production, they create it. Confiscatory policies lead to less business creation; if Gates, Musk, Bezos, Zuckerberg and Page had not had the wealth to create the businesses that made them billionaires, those businesses wouldn't exist, the jobs and products they create wouldn't exist. Europe demonstrates this empirically with its complete lack of any big tech companies, a result of its hostile policies and cultural attitudes to entrepreneurship.