Wealth doesn't inherently negate the potential for conflicts of interest or policy biases that could benefit a politician's own financial interests. After all, the same drive that helps individuals amass their fortunes—ambition, competitiveness—doesn't just switch off once they're in a position of public power. And personal integrity isn't tied to one's bank account balance; it's about character and the robustness of political and legal accountability systems.
So, regardless of whether someone is wealthy before politics, without strong ethical standards and transparent oversight, the risk of using political office for personal gain remains.