Supply-Side Liberalism and Electric Vehicle Facing

What does account for the creation of this class of super billionaires who control orders of magnitude more wealth than their super rich predecessors in prior eras? There's a number of fairly banal but important policy explanations like things that have happened with taxation. Corporate concentration is important in terms of increasing profit margins. The complete disappearance of any working class capacity for shifting the distribution of wealth, either at the level of production or through the political system.