The Australian mining magnate and politician Clive Palmer has outright called out Gladys Berejiklian for taking bribes by Big Pharm in New South Wales. If this is true in a province/state in Australia, it is true right up to the federal level around the world.
Meanwhile, the International Consortium of Investigative Journalists, who blew open the Panama Papers, has dug up the dirt on politicians. Tony Blair is the classic example. You create a corporation, put in millions in real estate, the politician then buys a share of the company at a fraction of its assets and are paid under the table in a tax-free deal. They then go on TV and bash the hated rich, despite entering office broke and leaving extremely wealthy, set for life.